It is estimated that 1.0 kg of body fat will provide 3.8 x 107J of energy. A 67 kg climber decides to climb a moutain that is 3.5x103m high

a) How much work does the climber do against gravity in climbing to the top of the mountain

b)If the body's efficiency in converting the energy stored as fat to mechanical energy is 25%, determine the amount of fat the climber will use up in providing the energy required to work against the force of gravity

c) If the climb takes 8.0 h, what is the climbers average power ( kinetic energy can be ignored)