In a collision that is inelastic, the total _________ after the collision is not the same as before the collision.
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[Ques. 2] A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, the person's power output is __________.
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[Ques. 3] A 2-kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s, and they stick together. After the collision, the velocity of the combined bodies is __________ m/s pointing __________.
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[Ques. 4] Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.After the dropped box hits the floor, its kinetic energy is converted into ____________.
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[Ques. 5] Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.After you drop the box and it has fallen half way, its potential energy is __________ and its kinetic energy is __________.
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[Ques. 6] Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.You drop the box. As it falls to its original level, its kinetic energy is __________.
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[Ques. 7] Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.The increase of potential energy of the box is __________.
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[Ques. 8] Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.The work you do is __________.
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[Ques. 9] You carry a 20-N box 5 m horizontally across a room. The work you do is __________.
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[Ques. 10] Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The power you supply to the crate is __________.
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