Explicación:
a) Según la segunda ley de movimiento de Newton;
Fuerza = Masa * aceleración
Dado
Masa del coche = 200 kg
Fuerza aplicada = 800N
aceleración = Fuerza / Masa
aceleración = 800/200
aceleración = 4m / s²
b) Para que obtengamos la velocidad final del automóvil, necesitaremos el tiempo.
Suponiendo que el tiempo necesario es de 2 segundos
Sabemos que aceleración = velocidad / tiempo
velocidad = aceleración * tiempo
velocidad = 4 * 2
velocidad = 8 m / s
Por lo tanto, la velocidad final será de 8 m / s si el tiempo es de 2 s.
what is a car's acceleration between 25 s and 30 s?
Will the temperature of a plastic or wooden spoon be more than the temperature of a metal spoon if you put both of these in a cup of boiling hot water after 5 minutes? PLZ HELP, will mark brainliest
Answer:
no
Explanation:
the metal spoon would be higher temperature
Answer:
Yes
Explanation:
The whale shark is the largest of all fish and can have the mass of three adult
elephants. Suppose that a crane is lifting a whale shark into a tank for delivery
to an aquarium. The crane must exert an unbalanced force of 2.5 x 104 N to
lift the shark from rest. If the shark's acceleration while being lifted equals
1.25 m/s², what is the shark's mass?
Answer:
m = 20,000 kg
Explanation:
Force, [tex]F=2.5\times 10^4\ N[/tex]
Acceleration of the shark, [tex]a=1.25\ m/s^2[/tex]
It is required to find the mass of the shark. Let m is the mass. Using second law of motion to find it as follows :
F = ma
Putting the value of F and a to find m
[tex]m=\dfrac{F}{a}\\\\m=\dfrac{2.5\times 10^4}{1.25}\\\\m=20,000\ kg[/tex]
So, the shark's mass is 20,000 kg.
Please explain
A 50-kg person is in an elevator. Determine the normal force exerted on the person by the elevator, if the elevator is accelerating downwards at 5 m/s^2.
A person walks 8 m/s towards the north. Is this an example of speed or velocity? Explain your answer.
Answer:
I think it is velocity.
because velocity shows the direction and magnitude .
Answer:
Velocity
Explanation:
This is a case of velocity, since velocity apart from having magnitude also has direction. the person walks at 8 [m/s] to the North.
When we talk about speed, we only talk about the magnitude without taking into account the direction.
If a bicyclist travels 25 km/h, how long will it take her to travel 40 km?
Answer: 1.6 hours
Explanation: 40/1.6 = 25
The free-body diagram below shows the forces acting on a bicycle as the
rider pedals to the right. The vectors are not drawn to scale. The bicycle has a
weight of 700 N and a pedaling force of 325 N. As it moves, it encounters 100
N of air resistance. What is the net force on the bicycle in the x-direction?
Answer:
225 N to the right
Explanation:
got it wrong on the quiz and revealed the correct answer
In a classic experiment, a ball (Ball 1) is dropped from a specific height. At the same
time, an identical ball (Ball 2) is launched horizontally from the same height. Which
ball hits the ground first?
A.) The dropped ball (Ball 1) because its path is shorter,
B.) The launched ball(Ball 2) because the ball's velocity is greater.
C.) The two balls will reach the ground at the same time because the horizontal and vertical planes of motion are independent of each other and they were also released from the same height.
D.) It is not possible to determine which ball hits the ground first because of the complex nature of motion
Answer: C
Explanation:
Gravity is acting equally on both objects causing the same vertical velocity because they are the same objects. The object launched horizontally off a cliff has a longer range because of the greater initial horizontal velocity
Hope this helps you, sweetie!
If you ever need help ask people here on Brainly or contact me by my mail at
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Have a marvelous day! {:0)
The answer to the question related to the time for two balls to reach the ground is option C, the two balls will reach the ground at the same time because the horizontal and vertical planes of motion are independent of each other, and they are also released from the same height.
When a ball is dropped, knowing the height we could find the time with the following equation:
[tex] y_{f} = y_{i} + v_{i_{y}}t - \frac{1}{2}gt^{2} [/tex] (1)
Where:
[tex] y_{f} [/tex]: is the final height
[tex] y_{i} [/tex]: is the initial height
[tex]v_{i_{y}}[/tex]: is the initial speed of the ball in the vertical direction = 0 (it is dropped)
g: is the acceleration due to gravity
When the ball is launched horizontally from the same height, we could find the time with equation (1) since the acceleration in the horizontal direction is zero and the initial velocity in the vertical direction is also zero.
The horizontal motion is related to the equation:
[tex] x = v_{i_{x}}*t [/tex] (2)
We can notice in both cases that the ball is accelerated only by gravity.
Let's evaluate each statement
A) This statement is incorrect because the path is the same for both cases. The ball is dropped and launched from the same height.
B) This statement is also incorrect. The velocity of the dropped ball is the same as the velocity of the launched ball because the ball is accelerated only by gravity.
C) This statement is correct. We can see that we would get the same time in equation (1) since [tex]v_{i_{y}}[/tex], [tex]y_{f}[/tex], and [tex]y_{i}[/tex] is the same for the dropped ball and the launched ball.
D) This statement is incorrect. The nature of motion is related to a freefall motion in both cases.
Therefore, the answer is option C.
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Gamma rays are given out from the
of radioactive atoms. What one word completes the sentence??
Gamma rays are given out by the nucleus of certain radioactive materials. Radioactive material ray causes harm to the human beings and environment.
What is gamma-decay?Gamma decay is the production of extremely high-frequency electromagnetic radiation in order to stabilize the unstable nucleus. You must be well-versed in the various energy levels found in an atom.
The Nucleus has its own amount of energy. Gamma decay is the nucleus' method of transitioning from a higher energy level to a lower energy level by emitting high energy photons.
Gamma rays are given out by the nucleus of certain radioactive materials.
Hence, nucleus is the right answer for the blank.
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A force of 25 newtons moves a box a distance of 4 meters in 5 seconds.
The work done on the box is [___] Nm, and the power is [___] Nm/s.
h e l p
Answer:
100 Nm and 25Nm/s.
Explanation:
Given the following data;
Force = 25N
Distance = 4m
Time = 5secs
To find the workdone;
Workdone = force * distance
Substituting into the equation, we have;
Workdone = 25*4
Workdone = 100 Nm
To find the power consumed;
Power = workdone/time
Substituting into the equation, we have;
Power = 100/4
Power = 25Nm/s
The work done on the box is 100 Nm, and the power is 25 Nm/s.
- A type of elevator called a cage is used to raise and lower miners in a mine
shaft. Suppose the cage carries a group of miners down the shaft. If the
unbalanced force on the cage is 60.0 N, and the mass of the loaded cage is
1.50 10 kg, what is the acceleration of the cage?
20 POINTS.
URGENT HELP AND PLEASE EXPLAIN.
Student A states that when she sits down on a chair, she is exerting a force on the chair and that is all that happens. Student B states that when she sits on a chair, the chair is actually exerting a force back on her in reaction to her force exerted upon the chair Which student is correct and why?
Answer:
i think its student b (d)
Explanation:
it might be student b cuz every action creates an equal and opposite reaction
Student B states that when she sits on the chair, the chair is actually exerting a force back on her in reaction to her force exerted upon the chair because of newton's third law. Hence, option D is correct.
What is newton's third law?The third law of Newton asserts that when bodies interact, they exert forces that are equal in size and directed in the opposite direction. Another name for the third law is the law of reaction and action. This law is crucial for understanding issues with static balance, where all pressures are in balance, but it also remains true for bodies moving at a constant or accelerated speed.
It doesn't only use bookkeeping methods; the forces it represents are actual forces. For illustration, a book laying on a table exerts downward pressure equal to the weight of the book on the table. The table produces an equal and opposite force on the book in agreement with the third law.
Therefore, student B is correct that because of Newton's third law there is an equal and opposite action and counteracts the student's so that neither move.
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explain the difference in how particles are arranged in a solid,liquids and gases
Answer:
hope this helps
Explanation:
solid particles are arranged according to the size of the object
while liquid particles are arranged how they move freely together in the object they are in.
while gas particles are arranged scatterly like they spread.
I need the answer ASAP!
How does the Newton’s Law relate to the force of gravity
Answer:
Newton's second law of motion states that the acceleration of a system is directly proportional to and in the same direction as the net external force acting on the system, and inversely proportional to its mass. If the only force acting on an object is due to gravity, the object is in free fall.
Explanation:
Hope this helps :)
Can someone help me with these questions please. I will mark brainliest
Answer:
3: I can´t see the text/image, but it depend on the mass and the force applied to the ball, if both are too high, it will be harder to make a home run. (Second law)
4:It would be easier to make a home run because there is no interruption between the ball and the space the same travels. (Third law)
Explanation:
Which is the best description of a balanced diet?[food pyramid]
A. A vegetarian diet that includes no meat
B. A diet that consists of fewer than 2,000 calories per day
C. A diet that includes a wide variety of nutritious foods
D. A diet in which you eat at most three times a day
Answer:
A vegetarian diet that includes no meet is the best description of a balanced diet
Answer:
I should be B
Explanation:
extra characters lolhrhhdhfhdjdbfjsjf
A boxer hits punching bag and gives it a change in momentum of 12 kg multiplied by m divided by s over 7.0ms what is the magnitude of the net force on the punching bag
Answer: 1700
Explanation:
aluminium is metal or metalloid
Answer:
Aluminium is just on the metal side of the border between metals and metalloids, so it is not considered to be a metalloid
Explanation:
it is a metal
Answer:
Aluminum-(Al) is a metal
Describe the motion of an object in which it's speed is constant but the velocity is changing?
Answer:
To summarize, an object moving in uniform circular motion is moving around the perimeter of the circle with a constant speed. While the speed of the object is...
What does Radioactivity mean?
Answer:
Radioactivity means: the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
Explanation: I hope this helps! :)
Answer:
sending out harmful radiation caused when the nuclei (=central parts) of atoms are broken up.
What role does the battery play in this circuit design? A) The battery works as the system's wires.
B) The battery is the electrical power supply.
C) The battery is the circuit's main conductor.
D) The battery works as the system's electrical switch.
Answer:
B
Explanation:
i got it right on the usatestprep
A ball thrown vertically upward reaches a maximum height of 30 meters above the surface of Earth. At its maximum height, the speed of the ball is
Answer:
0 m/s
Explanation:
In this problem,
A ball thrown vertically upward reaches a maximum height of 30 meters above the surface of Earth. We need to find the speed of the ball at the maximum height. When an object reaches its maximum height, after then it starts to decrease its speed. As a result, the speed of the ball will be equal to 0 m/s.
The speed of the ball thrown upwards is zero when the object reaches maximum height.
The given parameter:
maximum height, h = 30 mThe velocity of an object thrown upwards decreases with time because the object is moving against gravity, and the eventually becomes zero when the object reaches maximum height.
[tex]v_f = v_0 - gt= 0[/tex]
Thus, the speed of the ball thrown upwards is zero when the object reaches maximum height.
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An object of mass(0.8kg) is attached to massless string of length (2.0),and swung with a tangential velocity of (3.0m/s) what is the tension in the string?
Answer:
3.6 N
Explanation:
The magnitude of centripetal force in this case is equal to the magnitude of tension in the spring.
The formula is :
T= mv²/r ------where T is tension
m= mass of object =0.8 kg
v= velocity of object {tangential velocity} = 3.0 m/s
r= length of string = 2m
Applying the formula with real values;
T= mv²/r
T= {0.8 * 3²} / 2
T= { 7.2}/2 = 3.6 N
Which of the following is true about the speed of light? (2 points)
Answer:
It is a constant when the light is traveling in a vacuum.
a train moving at a speed of 15 m/s is accelerated to 45 m/s over a 12 s period. what is the acceleration?
Answer:
2.5 m/s²
Explanation:
Given:
v₀ = 15 m/s
v = 45 m/s
t = 12 s
Find: a
a = (v − v₀) / t
a = (45 m/s − 15 m/s) / 12 s
a = 2.5 m/s²
An object travels in a straight line for 1200 m at a velocity of 50 m/s, what is its time of travel?
Given that,
distance = d = 1200m
velocity/speed = s = 50m/s
time = t
Also,
s = d/t
And,
t = d/s
t = 1200/50
t = 120/5
t = 24
Therefore, it takes 24s to travel.
Answer: Therefore, the travel time of a car that travels 1200 meters at 50 m/s is 24 seconds.
Explanation:
An object travels in a straight line for 1200 m at a velocity of 50 m/s, what is its time of travel?
Data:
d = 1200 m
V = 50 m/s
t = ?
The formula for uniform motion is:
V = d/tWhere
V = speedd = distancet = timeWe clear the formula for time t:
t = d/v
t = (1200 m)/(50 m/s)
t = 24 s
Therefore, the travel time of a car that travels 1200 meters at 50 m/s is 24 seconds.
Materials that resist the charges flowing through
are
If two equal forces act on an object in opposite directions, what is the net
force? What is the objects acceleration?
Answer:
Net Force = 0
Explanation:
Causes objects to accelerate. Balanced Forces. Two equal forces push in opposite direction causing no change in motion causing net force = 0.
how much would a person whose mass is 60kg weight on the moon
what is the density to the object g/cm3