Homework Answers
Higher the bicyclist is, the higher is his potential energy and the lower is his kinetic energy and the sum of these two energies is constatnt at all positions.
So,
1. F
2. D
3. D
4. D (because highest kinetic energy)
5. D
6. A
7. Neither. The total energy is always constant.
8. E ( because at E the potential energy will be equal to that at A and hence his kinetic energy will be zero. So, no momentum to go further).
Comment if any problem
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where the collision happened. Was this a perfectly inelastic
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A perfectly elastic collision is one in which kinetic
energy is conserved. How exactly is kinetic energy not conserved
though? Sometime KE can be used up compressing/bending things and
making heat,...
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