# An astronaut with a mass of #75 kg# is floating in space. If the astronaut throws an object with a mass of #6 kg# at a speed of #4/5 m/s#, how much will his speed change by?

The astronaut will get a velocity

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The astronaut's speed will change by approximately 0.0533 m/s in the opposite direction of the thrown object.

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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 #2 kg# is rolling at #7 m/s# and elastically collides with a resting ball with a mass of #1 kg#. What are the post-collision velocities of the balls?
- A ball with a mass of #6# #kg # and velocity of #7# #ms^-1# collides with a second ball with a mass of #4# #kg# and velocity of #- 8# #ms^-1#. If #15%# of the kinetic energy is lost, what are the final velocities of the balls?
- Are the velocity change of two respective objects involved in a collision always equal?
- What is the momentum of a 3-kg object moving at 5 m/s?
- An astronaut with a mass of #80 kg# is floating in space. If the astronaut throws an object with a mass of #7 kg# at a speed of #3/8 m/s#, how much will his speed change by?

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