Question

A conveyor belt of width 10 m is moving along x-axis with speed 4 m/s as shown in the figure. Two points A and B are situated on the conveyor belt. A person want to move from A to B in least time. His speed with respect to belt is 2 m/s. The time taken by the person is –

• A. 2.5 s
• B. 5 s
• C. 4 s
• D. 3 s

Answer 1

Answer: (B)

5 s

Answer 2

t_min = $\frac{AB}{v_{P/C}}$

= $\frac{10}{2}$ = 5 s