Yes there are cases when we will see no transfer of energy even on application of force.
Example – When a body moves in circular motion then force acts normal to the displacement of the body then there is no transfer of energy and work done is zero.
Question
Is it possible that no transfer of energy takes place even when a force is applied to a body?
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The diagram given below shows a ski jump. A skier weighing 60kgf stands at A at the top of ski jump. He moves from A and takes off for his jump at B. 
(a) Calculate the change in the gravitational potential energy of the skier between A and B. (b) If 75% of the energy in part (a) becomes the kinetic energy at B, calculate the speed at which the skier arrives at B.(Take g = 10 ms-2).
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A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground. Taking g = 10ms-1, calculate: (a) the potential energy possessed by the ball when it is initially at rest. (b) the kinetic energy of the ball just before it hits the ground? (c) What happens to the mechanical energy after the ball hits the ground and comes to rest?
Open Answer »Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when(i) the body is at the top,(ii) the body has fallen a distance x,(iii) the body has reached the ground.
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