JAMB - Physics (1999 - No. 40)
The figure above represents a frictionless pulley system in which a weight W is in equilibrium with a weight of 40N. Find the value of W
13.3N
20.0N
40.0N
80.0N
Giải thích
With P1 and P2 as shown (make a V.R of 2), the weight W = 40N * 2 = 80N