A person of mass stands on frictionless roller skates facing a rigid wall
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A person of mass 80kg stands on frictionless roller skates facing a rigid wall. He pushes the wall horizontally with a steady force of 200N for 0.50s.
(i) Identify the action force and the corresponding reaction force involved during the push.
(ii) Calculate the magnitude of the acceleration of the person while he is in contact with the wall.
(iii) The wall remains at rest despite the force applied to it. Explain why the wall does not move even though it experiences an equal and opposite force.