Answer:
W=F*D
40,000=800*50
With this you are wrong and he is right because work is not like displacement where if you go 10 ft to the right then 10 ft to the left you have traveled gone 0 ft from original spot. because your distance was 50 m and you exerted 800 N you multiply that together and come out with 40,000 so HE IS RIGHT YOU ARE WRONG.
PLZ mark as brainliest
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
plz, show the equation.
Answer:
6m/s²
Explanation:
Given parameters:
Initial velocity = 4m/s
Time = 3s
Final velocity = 22m/s
Unknown:
Average acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time taken.
Acceleration = [tex]\frac{Final velocity - Initial velocity }{Time}[/tex]
Acceleration = [tex]\frac{22 - 4}{3}[/tex] = 6m/s²
A 33 kg child on a swing has a potential energy of 720 J with respect to the ground. What is the child’s height above the ground? please answer soon
Answer:
h = 2.22 m
Explanation:
Using the international system, we know that the gravity of the earth is 9.8 m / s².
then, we have as data:
Potential Energy (Ep) = 720 JMass (m) = 33 kgGravity (g) = 9.8 m/s²Height (h) = ?Use formula:
[tex]\boxed{h=\frac{Ep}{m*g}}[/tex]Replace:
[tex]\boxed{h=\frac{720J}{33kg*9.8\frac{m}{s^{2}}}}[/tex]Joules descompose:
[tex]\boxed{h=\frac{720N*m}{33kg*9.8\frac{m}{s^{2}}}}[/tex]Solve the multiply of mass and gravity:
[tex]\boxed{h=\frac{720N*m}{323.4kg*\frac{m}{s^{2}}}}[/tex]Multiply the units. Knowing that kg * m/s² = N, so:
[tex]\boxed{h=\frac{720N*m}{323.4N}}}[/tex]Simplify the Newtons (N), and it divides:
[tex]\boxed{h=2.22\ m}[/tex]What is the child’s height above the ground?
The child's height above the ground is 2.22 meters.
To date, Saturn is known to have 13 rings made from which of the following?
A. Dust
B. Dark particles
C. Moons
D. Stars
Answer:
it is believed to be shattered moons, asteroids, and comets, so C
Explanation:
Sue and Shannon are having an argument about diet myths. In order to settle the argument, select the "myth" that is really a TRUE statement.
Answer:
To lose weight, you must use more weight than you consume. (D.)
Explanation:
I took the test and got a 100
Do the atoms in salt follow a pattern
Answer:
Explanation:
Yes, the atoms in a salt do follow a pattern knows as crystalline pattern or crystalline structure. It means it has an ordered arrangement of atoms or ions. As salt is an ionic compound of Sodium and Chlorine, it is formed through ionic bond. This pattern keeps on repeating for each molecule of NaCl
Answer:
yes they do crystalline pattern as well as othe ionic compounds.
2. How much energy does a 5 kg tennis ball have
that is sitting on a shelf that is 2m high?
Answer:
GPE= h a m
GPE= (2)(9.8)(5)
GPE=98 J
Which color of visible light has a shorter wavelength than blue light? O A. Red O B. Green O C. Violet OD. Orange A
Answer:
It's violet........
Explanation:
This was right for me.
The color of visible light that has a shorter wavelength than blue light is Red. The correct option is A.
What is electromagnetic spectrum?The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is packet of energy that travels and spreads out. It has radio waves, infrared waves and visible light waves, ultraviolet rays and microwaves.
They possess high energy even to penetrate deep within the material. electromagnetic spectrum ranges from longer wavelength and less frequency to shorter wavelength and high frequency.
The light with higher wavelength is Blue and the shorter wavelength is Red and the rest of all spectrum colors are in between.
Thus, the correct option is A.
Learn more about electromagnetic spectrum.
https://brainly.com/question/23727978
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What is the charge of a Sulfur atom if it has 17 electrons?
Answer:
-1
Explanation:
An atom contains a proton, electron and neutron as subatomic particles. The number of protons, which is the positively charged particle (+) is always equal to the number of electrons, which is the negatively charged particle (-) in A NEUTRALLY CHARGED ATOM i.e. no charge.
However, a decrease or increase in charge is dependent on the number of electrons and protons in that atom. Sulfur atom has an electron number of 16 in its neutral atom, however, when it gains one more electron to become 17, it means that the charge has become -1 because the charge = number of protons - number of electrons i.e. 16 - 17 = -1.
How do speed, velocity, and acceleration relate to objects in motion?
Answer:
However, it is important to remember that acceleration is change in velocity. So, even if an object is moving at a constant speed, if it changes direction, the object is accelerating. Most people think of acceleration as an increase in speed. However, slowing down is also considered acceleration.
Explanation:
One role of a producer in a food chain is to provide? A) water for plants B) sunlight for plants C) nutrients for animals D) shelter for animals
Answer:
Nutrients for animals
Explanation:
Producers are organisms that produce their food, they do not need to depend on other animals for their food. They possess photosynthetic properties that enable them to produce their food.
These set of organisms are located at the bottom of the food chain, they can convert components like water, sunlight and air into carbohydrate through the unique process of photosynthesis.
Without these producers, the food chain would not exist as they form the base and foundation of the food chain, some lower animals depend on them as their source of food.
A roller coaster moves slowly at the top of a hill and increases as it moves down the hill increasing its kinetic energy. Where did this increasing kinetic energy come from?
a. The people and their belongings in the cars
b. The wind behind the cars
c. potential energy was transformed into kinetic energy
d. kinetic energy was added by a motor pushing the cars
Answer:
d
Explanation:
17. A car traveling with a velocity of 45 m/s and has a mass of 1120 kg. The car has kinetic energy. Calculate it
1134000J
Use the formula for kinetic energy K= 1/2*m*v^2
K=(1120*45^2)/2=1134000 Joule
Answer:
kg
Explanation:
A student fires a cannonball diagonally
from the ground as shown. Neglect drag
and the initial height of the cannonball.
After the ball lands on the ground enter
zero for all speeds and heights if necessary.
Answer:The cannons total flight time is 2.23seconds
Explanation:
A ball fired diagonally is fired at an angle of 45° to the horizontal. The motion of the fired ball is a projectile motion. A projectile is a motion in which an object fired into space with an initial velocity U is allowed to fall freely under the influence of gravitational force.
To total time of flight T of the cannon ball can be expressed as;
T = 2Usin(theta)/g where;
U is the initial velocity or speed of the ball = 31m/s
theta is the angle that the ball make with the horizontal = 45°
g is the acceleration due to gravity = 9.81m/s²
Substituting the given datas into the formula we have;
T = 31sin45°/9.81
T = 31×0.7071/9.81
T = 21.92/9.81
T = 2.23seconds
PLEASE HELP ME I HAVE NO IDEA WHO JAKIE ROBINSON IS...
1.) Why is Jackie Robinson an American hero?
2.) What do you admire about Mr.Robinson
3.) If Jackie Robinson was alive today, what do you think he will have to say?
Answer:
ch 46umm nym m m m m hj hj hj
Explanation:
What is the unit of work? (select all that apply) *
force
Kg*m/s^2
kg*m^2/s^2
joule
A lastname
none of the above
Answer:
Joule is the answer
Please give me brainleast
Joule is the unit of work .
What is meant by work ?
Activity that a person habitually engages in to earn a living is activity that persons looking for job engage in.
Activity in which one utilises strength or faculties to do or do anything. a particular duty, responsibility, function, or assignment that often forms a component or stage of a bigger action.
Thus, Joule is the SI unit of work (J). The work accomplished by a force of one newton creating a displacement of one metre is known as a joule.
To learn more about Joules, refer to the below link:
https://brainly.com/question/23501345
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The car transports 180 m in 12 s. Calculate its speed and express it in m / s and in km / h
Explanation:
Given parameters:
Distance = 180m
Time = 12s
Unknown:
Speed in m/s and km/hr
Solution:
Speed is the distance divided by the time taken,
Speed = [tex]\frac{distance}{time}[/tex]
So;
Speed = [tex]\frac{180}{12}[/tex] = 15m/s
1000m = 1km
3600s = 1hr
Therefore;
15 x m x [tex]\frac{1}{s}[/tex] x [tex]\frac{1km}{1000m}[/tex] x [tex]\frac{3600s}{1hr}[/tex] = 54km/hr
A 10 kg ball is released from the top of a hill. How fast
is the ball going when it reaches the base of the hill?
Approximate g as 10 m/s2 and round the answer to the
nearest tenth.
m/s
hy = 2 m
h = 0.5 m
Answer: 5.5 m/s
Explanation:
5.5 is the answer for edge :)
proverbs from taiwanese
water can help a boat float, but it can also sink it
Answer:
A beautiful person might not have a beautiful life.
Explanation:
Answer:
yes cause water has weight and too much weight can tip or even sink the boat
Explanation:
Need help ASAP please and thank you
Answer:
H
Explanation:
Answer:
Pacific Ocean and Nazca plates is moving to west
Explanation:
beacause if they move to west they will move to the left
how do i calculate this?
CAR 1
Momentum = Mass/Velocity
M = 2100/20
M = 105 m/s^2
CAR 2
Momentum = Mass/Velocity
M = 2100/30
M = 70 m/s^2
A 900 kg car has a momentum of 11,700 kg-m/s towards the west. What is the magnitude and direction of its velocity?
Answer:
mv=11700
m=900
v=11700/900=13m/s in west
Milk in a hot cup can be cooled by pouring its back and fourth between the bigger cup.How does this action help to cool milk?
NEED HELP ASAP !! WILL GIVE BRAINLEIST !!
Answer:
53775
Explanation:
ke= 0.5mv(2)
= 0.5 x 478 x 15(2)
53775
plzzzzzz help :(((((((((((
Answer:
4. a) F
b) E
c) B
d) D
Hope it helps
A 32 kg object has a momentum of 480 kg m/s northward. What is the
object's velocity?
O A. 15,360 m/s
B. 15 m/s
O C. 448 m/s
OD. 0.067 m/s
Answer:
B. 15 m/s
Explanation:
p = m × v
480 = 32 × v
32v = 480
v = 480/32
v = 15 m/s
Answer:
B. 15 m/s
Explanation:
P=MV
480=32×v
v=15m/s
What is neptune made out of?
Answer:
Structure. Neptune is one of two ice giants in the outer solar system (the other is Uranus). Most (80 percent or more) of the planet's mass is made up of a hot dense fluid of "icy" materials—water, methane and ammonia—above a small, rocky core. Of the giant planets, Neptune is the densest.
Explanation:
Answer:
Neptune is one of two ice giants in the outer solar system (the other is Uranus). Most (80 percent or more) of the planet's mass is made up of a hot dense fluid of "icy" materials—water, methane and ammonia—above a small, rocky core. Of the giant planets, Neptune is the densest.
On Distance Displacement Position vs. Time graphs. Velocity vs. Time graphs, and Acceleration vs. Time graphs, which vanable is always on the x-axis? A:Distance/Displacement/Position C:Acceleration B:Time D:Velocity
Answer:
your question dosent make sense?
Explanation:
Answer:
The time is always in the x axis.
Explanation:
A 5 kg block is pulled across a table by a horizontal force of 40 N with a frictional force of 8 N opposing the motion. Calculate the acceleration of the object.
Answer:
a = 6.4 [m/s²]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration. In this way, we have the following equation.
∑F = m*a
where:
∑F = sum of forces (horizontal force = 40 [N] and friction force = 8 [N])
m = mass of the block = 5 [kg]
a = acceleration [m/s²]
Now replacing:
[tex]40-8=5*a\\32 = 5*a\\a=6.4[m/s^{2} ][/tex]
Note: the sign of the friction force is negative since this force is acting against the movement of the block.
Which property of an object changes when an unbalanced force acts on it?
Mass
Inertia
Velocity
Temperature
Answer:
Velocity
Explanation:
When unbalanced forces acts on an object the velocity of the object changes. This is because, unbalanced forces causes a body to accelerate.
Acceleration is the rate of change of velocity with time taken.
An unbalanced force on a body causes a net force greater than zero and this makes the velocity of the body to change.
Therefore, an unbalanced force on a body will cause a change in the velocity of the body.
Answer:
velocity
Explanation:
mhm
Help please!
What happens to holes in the ground over time due to weathering and erosion?
Answer:
They are buried in the ground due to weathering and erosion
Explanation:
Answer:
They are buried in the ground due to weathering and erosion.