# Can an object that is not moving have momentum?

No, an object's mass (m) multiplied by its velocity (v) equals its momentum (p).

P equals mv

No momentum equals no velocity!

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Yes, an object that is not moving can have momentum if it has mass.

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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 #6 kg# moving at #9 ms^-1# hits a still ball with a mass of #4 kg#. If the first ball stops moving, how fast is the second ball moving?
- The velocity of an object with a mass of #3 kg# is given by #v(t)= 3 t^2 - 5 t #. What is the impulse applied to the object at #t= 2 #?
- An astronaut with a mass of #95 kg# is floating in space. If the astronaut throws an object with a mass of #4 kg# at a speed of #1/4 m/s#, how much will his speed change by?
- A ball with a mass of # 5 kg# is rolling at #3 m/s# and elastically collides with a resting ball with a mass of #4 kg#. What are the post-collision velocities of the balls?
- An astronaut with a mass of #80 kg# is floating in space. If the astronaut throws a #5 kg# object at a speed of #9 m/s#, how much will his speed change by?

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