Question

In the figure, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?

• A. Magnitude of force applied by A is greater than that of B.
• B. Magnitude of force applied by A is smaller than that of B.
• C. Net force on the block is towards A.
• D. Magnitude of force applied by A is equal to that of B.

Answer 1

The correct option is A Magnitude of force applied by A is greater than that of B.

Let's say $F_A$ and $F_B$ are the forces applied by the boys A and B respectively.
In the right direction,
the total force = $F_A$-$F_B$

Since, the block is moving in the right direction, the net force in the right direction must be positive.
Therefore,
$F_A$-$F_{\mathrm{B\; >}}$0
or, $F_A$> $F_B$