question_answer

A boy having a mass equal to 40 kilograms is standing in an elevator. The force felt by the feet of the boy will begreatest when the elevator             \[(g=9.8\,metres/{{\sec }^{2}})\]     [MP PMT 1995; BVP 2003]            

A)                              Stands still            

B)                         Moves downward at a constant velocity of 4 metres/sec            

C)                         Accelerates downward with an acceleration equal to \[4\,metres/{{\sec }^{2}}\]            

D)                         Accelerates upward with an acceleration equal to \[4\,metres/{{\sec }^{2}}\]