# In a collision, do the two colliding objects have different acceleration values?

In general, yes, they do have different acceleration values.

Study of the 2 objects must both be done with the same reference system. Therefore the acceleration of one would be positive and the other would be negative. But perhaps it could be said that it should be obvious that the question really meant magnitude of acceleration.

By the principle of conservation, they have equal (but opposite) change in momentum. If they have equal mass, the velocity change of each would be equal (but opposite). The times of contact for both would be equal. So in the case of equal mass, acceleration would be equal (but opposite).

If the masses are different, they would have different acceleration values.

I hope this helps, Steve

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In a collision, the two colliding objects may have different acceleration values depending on their masses and the forces involved in the collision.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- A ball with a mass of #4 kg # and velocity of #6 m/s# collides with a second ball with a mass of #7 kg# and velocity of #- 1 m/s#. If #25%# of the kinetic energy is lost, what are the final velocities of the balls?
- A ball with a mass of #8 kg# moving at #8 m/s# hits a still ball with a mass of #9 kg#. If the first ball stops moving, how fast is the second ball moving?
- How much momentum does a #12 kg# object moving at #9 m/s# have?
- Which has more momentum, an object with a mass of #50kg# moving at #23m/s# or an object with a mass of #200kg# moving at #7m/s#?
- Which has more momentum, a #2kg# object moving at #9m/s# or a #1kg# object moving at #7m/s#?

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