A bus initially moving at 20 m/s with an acceleration of -4m/s2 for 5
seconds. What is the displacement AND final velocity?

Answers

Answer 1

Answer:

50m; 0m/s.

Explanation:

Given the following data;

Initial velocity = 20m/s

Acceleration, a = - 4m/s²

Time, t = 5secs

To find the displacement, we would use the second equation of motion;

[tex] S = ut + \frac {1}{2}at^{2}[/tex]

Substituting into the equation, we have;

[tex] S = 20*5 + \frac {1}{2}*(-4)*5^{2}[/tex]

[tex] S = 100 + (-2)*25[/tex]

[tex] S = 100 - 50[/tex]

Displacement, S = 50m

Next, to find the final velocity, we would use the third equation of motion;

[tex] V^{2} = U^{2} + 2aS [/tex]

Where;

V represents the final velocity measured in meter per seconds. U represents the initial velocity measured in meter per seconds. a represents acceleration measured in meters per seconds square.

Substituting into the equation, we have;

[tex] V^{2} = U^{2} + 2aS [/tex]

[tex] V^{2} = 20^{2} + 2(-4)*50 [/tex]

[tex] V^{2} = 400 - 400[/tex]

[tex] V^{2} = 0[/tex]

Final velocity, V = 0m/s

Therefore, the displacement of the bus is 50m and its final velocity is 0m/s.


Related Questions

Which of the following games below involves different manipulative skills like throwing and rolling and some motor skills?




Group of answer choices

target games

invasion games

striking and fielding games

physical activity

Answers

Answer:

striking and fielding

Explanation:

striking and fielding

While spending the weekend in your cabin, you burn wood in your pot-bellied stove to heat a kettle of water for tea.

Answer the following questions for 2 points each:

1. What type of energy does the wood have in this situation. Explain your answer.

2. What type of energy is this transformed into as the wood it burned in the stove. Explain your answer.

3. What type of heat transfer is being used to warm the kettle of water? Why does the water eventually boil?

Answers

Answer: 1 = Heat

2=gas

3=it gets hot enough to boil because the metal conducts the heat into the water to heat it up and eventually boil.

Explanation: its common sense

1. In the context of the poem, what does it mean to feel alone? How can two people experience isolation despite living in the same home and being in the same relationship? What effect does one’s expectations of a relationship have on feelings of isolation?

Answers

hello

Explanation:

I haven't read the poem because you didn't attach it but here is my go at answering the question- although we find it hard to imagine being lonely while with others... if you lack emotional or intellectual connection even being physically near someone you are not mentally there

PWEESE HELP
LOOK AT THE IMAGE BELOW

Answers

Answer: 2 m/s is the answer

Explanation:

A construction crew must use a lever to lift a boulder. The mechanical advantage of the lever is 6 and the lever applies a force of 1600 N to the rock. What is the force that the construction crew must apply to the lever?

Answers

Answer:

The force the construction crew must apply to the lever is 266.67 N

Explanation:

Mechanical advantage is the measure of the ratio of output force to input force in a system. Hence, mechanical advantage (MA) is given by the formula

[tex]MA = \frac{F_{o} }{F_{i} }[/tex]

Where MA is the mechanical advantage

[tex]F_{o}[/tex] is the output force

and [tex]F_{i}[/tex] is the input force

From the question, the mechanical advantage of the lever is 6

That is, MA = 6

and the lever applies a force of 1600 N to the rock

That is, Output force, [tex]F_{o}[/tex] = 1600 N

To determine the force the construction crew must apply to the lever, that is the input force, [tex]F_{i}[/tex]

From

[tex]MA = \frac{F_{o} }{F_{i} }[/tex]

We can write that

[tex]F_{i} = \frac{F_{o} }{MA}[/tex]

Then,

[tex]F_{i} = \frac{1600N}{6}[/tex]

[tex]F_{i} = 266.67 N[/tex]

Hence, the force the construction crew must apply to the lever is 266.67 N.

The force that the construction crew must apply is 266.67 N.

A machine is a device in which the effort applied at one end is used to overcome a load at another end. The mechanical advantage is the ratio of load to effort of a machine.

We have the following information;

Mechanical advantage (MA) = 6

Load =  1600 N

Effort = ?

Substituting values;

6 = 1600N/Effort

Effort =  1600N/6

Effort =   266.67 N

Learn more: https://brainly.com/question/8592296

where is the centripetal force directed on a banked curve?

Answers

Answer:

The net force on a car traveling around a curve is the centripetal force, Fc = m v2 / r, directed toward the center of the curve.

Explanation:LET ME KNOW IF ITS WRONG. HAVE A NICE DAY!!!!!!!!!!

Answer: The net force on a car traveling around a curve is the centripetal force, Fc = m v2 / r, directed toward the center of the curve. The centripetal force is directed at right angles to the motion and also along the radius towards the centre of the circular path. In order for a car to move around a circular track, something must provide a centipetal force. One source of the centripetal force is friction between the tires and the road. This means that the tires do not need to supply any friction at all to keep the car from slipping sideways. ...

Hope this helps... stay safe and have a great day!!! :D

The red car drive on a motor way in 800 m/s.The
driver of the Green car want to dive in that speed in
20 seconds.How many distance can he travel?​

Answers

800/20=40
So the green car would be able to drive 40m

Question 10 (1 point)
When the student releases the water balloon, it swings forward. When the water balloon swings back, you can tell that the student expects the
water balloon to hit her face. Why does the water balloon not continue on and hit the student's face?

Answers

Answer:

It does not hit the students face because the speed of the balloon slows down as energy is lost through thermal.

Explanation:

DESPERATE WILL GIVE BRAINLIST and thanks
Radiometric dating is a form of relative dating.
Question 4 options:
True
False

Answers

Answer: True

Explanation:

(i hope this helps sorry kinda late but i did not see any answers)but can i have brainlist

Can some one help me please and thanks

Answers

Answer:

The way in which objects exert forces on each other is described by Newton’s 3rd law of motion

Explanation:

Objects with mass exert forces on each other via the force of gravity. This force is proportional to the mass of the two interacting objects and is inversely proportional to the square of the distance between them. The factors G, M, and rare the same for all masses at the surface of the Earth.

Why are recessive traits not seen even though they are present in the alleles?​

Answers

Answer:

Explanation:. The vending machine holds 10 bags of pretzels and 8 packs of cheese crackers.  Both the pretzels and crackers dispenseat 2 bags per hour. How many hours will elapse when there is the same number of snacks remaining in the vending machine?  How many of each item will there be at this point?Equation1______________________________Equation2_______________________________Hours: ___________________________ Items: ____________________________What does each equation have n common? ______________________How does this affect the solution?

Average acceleration of an object is the:

Change in its position divided by the change in time
Change in time divided by the change in its position
Change in its velocity divided by the change in time
Change in time divided by the change in its velocity

Answers

Answer:

Change in its velocity divided by the change in time

Explanation:

the equation for average acceleration (a) = (vf-vi)/t

a = (velocity final - velocity initial) / change in time

What may also be called breakers? Crusher, Grappler, Hydraulic Hammer, Trencher

Answers

I believe it’s ‘Hydraulic Hammer’..

A golf ball is hit horizontally off the edge of a 30 m high cliff and lands a distance of 25 m from the edge of the cliff. What was the initial vertical velocity of the golf ball?At what time did the golf ball hit the ground?What was the initial horizontal velocity of the golf ball? What was the final horizontal velocity of the golf ball?


Answers

Answer:

V₀y = 0 m/s

t = 2.47 s

V₀ₓ = 61.86 m/s

Vₓ = 61.86 m/s

Explanation:

Since, the ball is hit horizontally, there is no vertical component of velocity at initial point. So, the initial vertical velocity (V₀y) will beL

V₀y = 0 m/s

For the initial vertical velocity of golf ball we consider the vertical motion and apply 2nd equation of motion:

Y = V₀y*t + (0.5)gt²

where,

Y = Height = 30 m

g = 9.8 m/s²

t = time to hit the ground = ?

Therefore,

30 m = (0 m/s)(t) + (0.5)(9.8 m/s²)t²

t² = 30 m/4.9 m/s²

t = √6.122 s²

t = 2.47 s

For initial vertical velocity we analyze the horizontal motion of the ball. We neglect the frictional effects in horizontal motion thus the speed remains uniform. Hence,

V₀ₓ = Xt

where,

V₀ₓ = Initial vertical Velocity = ?

X = Horizontal Distance = 25 m

Therefore,

V₀ₓ = (25 m)(2.47 s)

V₀ₓ = 61.86 m/s

Due, to uniform motion in horizontal direction:

Final Vertical Velocity = Vₓ = V₀ₓ

Vₓ = 61.86 m/s

If a feather takes 2.5 seconds to drop 200cm, what is the speed of this feather

Answers

Answer:

80cm per second

Explanation:

The car's initial speed was 15 m / s and the distance the car travels before it comes to a complete stop after the driver applies the brakes is 63m. What is the magnitude of the car's acceleration?

Answers

Initial speed of the car (u) = 15 m/s

Final speed of the car (v) = 0 m/s (Car comes to a complete stop after driver applies the brake)

Distance travelled by the car before it comes to halt (s) = 63 m

By using equation of motion, we get:

[tex] \bf \longrightarrow {v}^{2} = {u}^{2} + 2as \\ \\ \rm \longrightarrow {0}^{2} = {15}^{2} + 2 \times a \times 63 \\ \\ \rm \longrightarrow 0 = 225 + 126a \\ \\ \rm \longrightarrow 126a = - 225 \\ \\ \rm \longrightarrow a = - \dfrac{225}{126} \\ \\ \rm \longrightarrow a = - 1.78 \: m {s}^{ - 2} [/tex]

[tex] \therefore [/tex] Acceleration of the car (a) = -1.78 m/s²

Magnitude of the car's acceleration (|a|) = 1.78 m/s²

A truck moving due south takes a turn and starts moving towards east while maintaining the same speed.
Its velocity remains constant.
It covers unequal distances in equal intervals of time.
Its velocity changes
None of the above

Answers

Answer:

Its velocity changes

Explanation:

When the truck changes direction, its velocity changes.

Velocity is a vector quantity that specifies the magnitude of motion and direction it is taking.

When direction changes, the velocity of a body will also change. This is unlike speed which is a scalar quantity.

 Velocity is the displacement divided by time taken.

A machine has mechanical advantage 2,what does it mean?​

Answers

Answer:

The mechanical advantage of a machine is 2. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 2 means that for example if you apply 100 N then your machine will multiply that force and generate 200 N .

Only visibly rough surfaces have friction between them

Answers

Rougher surfaces have more friction between them

All elements are composed of extremely small particles called

Answers

The answer is Atoms they are in every single element

State the relation between the joule and kilocalories.

Answers

Explanation:

1 Kilocalories = 4,184 Joules

Answer:

The relationship between calorie and joule are proportionate. Which implies, the calorie is directly proportional to the joule. That means-

When the value in terms of calorie increases, its corresponding value in joules also increases at a rate of 4.2.

When the value in terms of calorie decreases, its corresponding value in joules also decreases at a rate of 4.2.

a calorie is the unit of energy.Calorie or kilocalorie is the unit of energy = 1000 calories.Joule is the unit of energyKilojoule is the unit of energy, = 1000 joules.

Rohith has been jogging to the bus stop for 2.0 minutes at 3.5 m/s when he looks at
his watch and sees that he has plenty of time before the bus arrives. Over the next
10.0s, he slows his pace to a leisurely 0.75 m/s. What was his average acceleration
during this 10.0 s?

Answers

Multiply these numbers and there’s your answer

a bird is traveling west with a velocity of 8 m/s and momentum of 40 mg*m/s what's the birds mass?

Answers

Answer:

m = 5 [mg]

Explanation:

We must remember that the definition of linear momemtum is defined as the product of mass by distance.

P = m*v

P = momentum = 40 [mg*m/s]

m = mass [mg]

v = velocity = 8 [m/s]

Now clearing m:

m = P/v

m = 40/8

m = 5 [mg]

PLEASE HELP MEEEEEE
Some physical evidence was obtained from a crime scene. For which of these pieces of evidence will forensic scientists conduct an identification test?
A.
a hair strand
B.
a black powder
C.
a glove
D.
bloodstains

Answers

I'm thinking the hair and the blood stains. They might test the others if they played a big role in the crime but primarily the first two because they have DNA. They can use DNA sequencing to help configure who.

Answer:

The correct option is D. bloodstains

HELP MEEEEE HURRRYYYY EASYY

What best describes the greatest height a ball will bounce off the ground after being dropped from a height of 50 centimeters?

A. Less than 50 centimeters, as the ball transforms some of its thermal energy into sound energy

B. Less than 50 centimeters, as the ball transforms some of its potential energy into sound energy

C. Greater than 50 centimeters, as the ball transforms some of its thermal energy into potential energy

D. Greater than 50 centimeters, as the ball transforms some of its potential energy into thermal energ

Answers

Answer:

C

Explanation:

thats what i think it depends on the amount of force someone dropped the ball with.

Answer: A) "Less than 60 centimeters, as the ball transforms a part of its potential energy into heat energy"

Explanation:

I took the test

what is the number of significant digits in the measurement 10.005m?

Answers

I think it’s five, all of the digits are significant figures.

A force of 30 Newtons is used to push a basket along the floor a total distance of 3 meters. How much work is done on the basket?

Answers

Answer:

the total work done is 90J

Explanation:

the reason why is because you are the force (30 newtons) and the metere (3) so you will be multiplying those two numbers together.

W= FD 30(3)= 90J

Which experimental discovery led Niels Bohr to revise Rutherford's model of
the atom?
A. Most alpha particles pass straight through a thin sheet of gold
foil.
B. Electrons have more energy the farther they are from the nucleus.
C. A few alpha particles bounce off a thin sheet of gold foil.
D. The beam in a cathode ray tube is moved by an electric force.

Answers

Answer:

Electrons have more energy the farther they are from the nucleus.

Explanation:

A P E X

A bicycle travels 22 km in 0.50 hr. What is its average speed?

Answers

Answer:

22/0.50=44

Explanation:

average speed= distance / time

pls help i will give u brianliest!

Answers

Answer:

Explanation:

neautrons and protons

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