Question

Consider a pulse created on the horizontal string highlighted. The net force applied by particles $A$ and $C$ on $B$ will be in

• A. upward direction
• B. downward direction
• C. left direction
• D. right direction

Answer 1

The correct option is B downward direction


From figure, we can see that particle $B$ is at extreme position. So, particle $B$ will try to pull particle $A$ and $C$ to the extreme position.

Hence, by Newton's third law of motion, particles $A$ and $C$ will pull particle $B$ in the opposite direction as shown in figure. Net force on particle $B$ will be downward.
Thus, option (b) is the correct answer