# A ball with a mass of #9 kg# moving at #3 m/s# hits a still ball with a mass of #12 kg#. If the first ball stops moving, how fast is the second ball moving?

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The second ball will move at a speed of 2.25 m/s in the opposite direction.

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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 #5 kg # and velocity of #2 m/s# collides with a second ball with a mass of #6 kg# and velocity of #- 3 m/s#. If #75%# of the kinetic energy is lost, what are the final velocities of the balls?
- A ball with a mass of #12 kg# moving at #6 m/s# hits a still ball with a mass of #16 kg#. If the first ball stops moving, how fast is the second ball moving?
- Which has more momentum, an object with a mass of #5kg# moving at #15m/s# or an object with a mass of #20kg# moving at #17m/s#?
- Assume a car and truck are moving with the Impulse same speed of 15 m/s. 1) Calculate momentum of the car of mass 975 kg 2) Calculate momentum of the truck of mass 2675 kg 3) Determine the force =? Needed to stop each in 25 s.
- Which has more momentum, an object with a mass of #6kg# moving at #2m/s# or an object with a mass of #12kg# moving at #3m/s#?

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