Question

In the diagram $100 \,kg$ block is hanging from a pulley and force $F$ is applied on the string to keep the system in equilibrium. If the whole system is moving up with a constant velocity $v$, then tension at point $P$ in the string will be

• A. 735 N
• B. 1050 N
• C. 1470 N
• D. 1200 N

Answer 1

Answer: (C)

1470 N

Answer 2

Tension in each part of the string will be F. Assume tension at point P is T. T = 3F 2F = mg 2F = 100 ??9.8 N F = 490 N $\therefore\quad$ T = 3 ??490 = 1470 N