A ball with a mass of #5 kg# moving at #3 m/s# hits a still ball with a mass of #8 kg#. If the first ball stops moving, how fast is the second ball moving?
We can calculate the final velocity of the second ball using momentum conservation. Momentum is conserved in all collisions.
In an inelastic collision, momentum is conserved as always, but energy is not; part of the kinetic energy is transformed into some other form of energy. Therefore, we have an inelastic collision.
Momentum conservation:
For multiple objects, we use superposition as with forces:
So we have:
We are given the following information:
Factoring in our zero values, we now have:
Substituting in our known values:
This answer can be checked by comparing the momentum before and after the collision. They should both be equal by momentum conservation.
By signing up, you agree to our Terms of Service and Privacy Policy
The second ball will be moving at 1.2 m/s in the opposite direction.
By signing up, you agree to our Terms of Service and Privacy Policy
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.
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 #9 kg# moving at #3 m/s# hits a still ball with a mass of #21 kg#. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
- In a collision, do the two colliding objects have different acceleration values?
- Which has more momentum, a #8kg# object moving at #4m/s# or a #6kg# object moving at #6m/s#?
- How much momentum does a #15 kg# object moving at #6 m/s# have?
- A ball with a mass of # 5# #kg# is rolling at #4# #ms^-1# and elastically collides with a resting ball with a mass of #3# #kg#. What are the post-collision velocities of the balls?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7