A body builder is about to lift a mass of 95 kg. A - What is the weight of the mass if the gravitational field strength on Earth is 9.81 N/kg?

B - If the mass is lifted through a distance of 1.6 m, what is the work done on the mass?

C - Calculate the maximum gravitational potential energy of the weight at this height?

D - The mass is lifted through the height in 2.5 s, what is the personal power of the body builder here?

No matter what energy transformation we discuss, we know that no energy transfer is 100% efficient. you are about to enter a bicycle rave. you have trained extensively and eaten well to maximize your energy input throughout the bicycle race. you know that some of your kinetic energy will become wasted energy in the form of heat. what is the source of the heat energy and how can you minimize it to maximize the efficiency of your performance in the race? a) you are the source of the heat energy. you can minimize the heat energy but selecting the appropriate clothes to wear. b) air resistance is the source of he heat energy. you can minimize the air resistance by your position while riding the bicycle. c) friction is the source of the heat energy. you can minimize the friction by lubricating all appropriate parts and keeping the tires well inflated. d) kinetic energy is the source of the heat energy. you can reduce the production of heat energy but minimizing the energy you expend to race on the bicycle.