Question

energy

1. true or false—a cyclist coasts down one hill and up another hill until she comes to a stop. the point at which the bicycle stops is lower than the point at which it started coasting because part of the original potential energy has been converted to a quantity of heat and this makes the tires of the bicycle warm.

a. true
b. false

Explanation:

This question relates to energy conservation and energy transformation, specifically in the context of a cyclist's motion. When the cyclist coasts, potential energy is converted to kinetic energy, but due to friction (between tires and the road, and within the bicycle's components), some energy is converted to heat (thermal energy), which increases the temperature of the tires. This means not all the initial potential energy is available to be converted back to potential energy as the cyclist goes up the next hill. So, the maximum height reached (where the bicycle stops) will be lower than the starting height because energy was lost as heat. Thus, the statement is true.

Answer:

a. True