Which of these would you include ina free body diagram for a bicycle-plus-rider taken together as the bicycle is being pedaled up the hill?

a- the reaction force that the road exerts on the bicycle
b-the force the bicyclist exerts on the handle bars
c-the force that the bicycle tire exerts backward on the road
d- the force that the bicycle pedal exerts on the bicycle chain

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.