# Which has more momentum, a #500kg# object moving at #1/4m/s# or a #50kg# object moving at #20m/s#?

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The 50kg object moving at 20m/s has more momentum.

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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 0.145 kg baseball is moving at 35 m/s it is caught by a player. What is the change in momentum of the ball?
- An astronaut with a mass of #75 kg# is floating in space. If the astronaut throws a #4 kg# object at a speed of #6 m/s#, how much will his speed change by?
- The velocity of an object with a mass of #8 kg# is given by #v(t)= sin 5 t + cos 3 t #. What is the impulse applied to the object at #t= ( 3 pi)/ 4 #?
- When a body falls, its momentum increases. Does this mean that the momentum is not conserved?
- A ball with a mass of #7 kg# moving at #4 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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