Question

A person standing on the floor of an elevator drops a coin. The coin reaches the floor of the elevator in a time $t_{1}$ if the elevator is stationary and in time $t_{2}$ if it is moving uniformly. Then :

• A. $t_{1}=t_{2}$
• B. $t_{1}< t_{2}$
• C. $t_{1} >t_{2}$
• D. $t_{1}< t_{2}$ or $t_{1}>t_{2}$ depending on whether the lift if going up or down.

Answer 1

Answer: (A)

If there is no acceleration in the elevator then coin will fall with acceleration $g$ relative to floor and will take equal time in all cases.