When is momentum conserved?A. it is conserved when only two objects collide; more than two objects can't conserve momentum.

B. it is always conserved.

C. momentum is conserved when the system is closed, which means there are no forces, like friction, acting on it.

D. momentum is never conserved.

Answers

Answer 1

Answer: C. momentum is conserved when the system is closed, which means there are no forces, like friction, acting on it.

Answer 2

Answer:

C. momentum is conserved when the system is closed, which means there are no forces, like friction, acting on it.

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Related Questions

Hello Please Help With A couple Science questions
When applying the process of science which of theseis tested 1.a question, 2.an observation, 3.a conclusion, 4.a prediction
Identify the objects that you would place into each group. A.wodden logs B.wrench C.plastic button D.cotton balls E. pin F. applev
what is a device that transforms thermal energy to mechanical energy
How do materials, such as nutrients and waste, pass through the cell membrane?

Which of these is true about inherited traits? A. All traits are inherited from only one parent. B. Every trait is controlled by only one gene. C. Traits always follow simple patterns of inheritance. D. Traits may be determined by multiple genes.

Answers

D, Traits may be determined by multiple genes.

The answer is D traits may be determined by multiple genes!! :) glad to help

Jenna ran around the school's track with an average speed of 4km/ h How Can Jill get a higher average speed than jenna

Answers

A She can run the same distance in a shorter amount of time.

Explanation:

Jill can achieve a higher average speed than Jenna if she runs the same distance in a shorter amount of time.

Speed is a physical quantity that deals with the rate of change of distance with time:

Speed = $(Distance traveled)/(time taken)$

The distance traveled is the length of the path covered and time taken is the duration.

To achieve a higher speed, it would be desired to have a lower time and the distance covered steadily increasing or staying the same.

To achieve a low speed, the distance must be decreasing and time increasing.

Learn more:

Speed brainly.com/question/10435836

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1)A cyclist travels ¾ of a circular track from A to b as shown in figure. The radius of the circular track is 400 m. Calculate the displacement and distance travelled by the cyclist.PLEASE SHOW ALONG WITH STEPS(1)

2)Two objects having their masses 3:5 are acted upon by two forces.The forces are in the ration of 5:3. find the ration in their accelerations.

PLEASE SHOW ALONG WITH STEPS (2)

3) A man pushes a box of mass 50 kg with a force of 80 N. What will be the acceleration of the box due to the force? what would be the acceleration if the mass were doubled?

PLEASE SHOW ALONG WITH STEPS(3)

4) How does the force of gravitation between two objects change when the distance between them is reduced to half.

PLEASE SHOW ALONG WITH STEPS (4)

5) Explain what happens to the force between two objects if:
A) the mass of one object is doubled?
B) the distance between the object is tripled.

PLEASE SHOW ALONG WITH STEPS (5)

6)How will the equations of motion for an object moving with a uniform velocity change?

PLEASE SHOW ALONG WITH STEPS (6)

7)The force of attraction between two bodies is 20N. Calculate the force between them when mass of each body as well as the distance between them are halved.

PLEASE SHOW ALONG WITH STEPS(7)

Answers

1). Distance is the length of the path he traveled. That's 3/4 of the circle.

Displacement is the length between where he started and where he ended.
That's 1/4 of the circle.

The circumference of a circle is (2 pi) · (the circle's radius) .

2). Force = (mass)·(acceleration) F = M·A
This is a very important formula. You should memorize it.
Whenever you see a problem that has force, mass, and
acceleration in it, this is the formula you need.

If you need to find acceleration (like in this problem),
divide each side by (mass), and then you have

Acceleration = (force) divided by (mass) .

First object: Mass=3, Force=5. Acceleration= 5/3 .

Second object: Mass=5, Force=3. Acceleration= 3/5 .

The question is asking for the ratio of these forces.

3). Guess what !    F = M · A .

Divide each side by Mass, and then you have

   Acceleration = (force) divided by (mass)

   = (80 N) / (50 kg) = ?

If the mass were doubled, it would be

   (80 N) / (100 kg) = ?

4). The force of gravity changes opposite to the distance between
the objects. That's why the Earth pulls on us harder than Jupiter does.
The farther apart things are, the WEAKER gravity pulls them together.

How fast does the gravity force decrease ?
It decreases with the SQUARE of the distance.
That means . . .
-- If the distance changes to 3 times as far, the force becomes 1/3² = 1/9 .
-- If the distance changes to 2 times as far, the force becomes 1/2² = 1/4 .
-- If the distance changes to 1/3 as far, the force becomes (3²) = 9 .
-- If the distance changes to 1/2 as far, the force becomes (2²) = ?

5). A). The force of gravity increases as much as the PRODUCT of
the masses increases.
If one mass is B and the other mass is D, then the force calculation
has 'B·D' in it. If one of the masses doubles, then the calculation
has '2·B·D' in it. How much did the original force change ?

5). B). This was all covered in the discussion of #4).

6). 'Uniform velocity' means the object is moving in a straight line
with a constant speed. Its speed is not changing, and its direction
isn't changing either.
If a little tiny physicist is riding inside that object, there's NO TEST
he can do that can show him that he's moving. He has all of the SAME
laws of motion that any other physicist has, who's moving in any other
direction with any other constant speed.

7). Their masses are 'B' and 'D'. The original product is 'BD'.
When each mass is cut in half, they'll become B/2 and D/2.
Their product will become BD/4 .
That change alone will change the force to 1/4 of what it was originally.

If the distance between them is cut in half, then the force
changes to (2²) = 4 times what it was originally.

So the combined effect of all these changes at the same time
is that the new force is exactly equal to the original force.

If u speed up from rest to 12 m/s in 3 seconds, what is your acceleration

Answers

4

Just divide 12 by 3, so if it takes 3 seconds, then every second, it goes up 4.

Acceleration = change in speed/time

Therefore it is 4m/s squared

Please explain as if I am a 6 year old; why is time travel theoretically impossible?

Answers

Why exactly do you mean

Time travel would create paradoxes and history could be altered, resulting in something called the "butterfly effect". This means that even the smallest of changes can result in a HUGE difference. If you traveled back in time, you would interact with people and things. This would alter history, creating massive ripples in time. The movie "Back to the Future" and the new Harry Potter book have great examples of this. Hope I answered your question!

1. The force between a pair of charges is 100 newtons. The distance between the charges is 0.01 meter. If one of the charges is 2 u 10-10 C, what is the strength of the other charge?2. The force between two charges is 2 newtons. The distance between the charges is 2 u 10-4 m. If one of the charges is 3 u 10-6 C, what is the strength of the other charge?