Particles of mass 3m and 5 m hang one at each end of a light inextensible string which passes over a pulley. the system is released from rest with the hanging parts taunt and vertical. during the subsequent motion the resultant force exerted by the string on the pulley is of magnitude-
a. 8mg
b. 7.5mg
c. 3.75mg
d. 4mg
e. 2mg

step-by-step explanation:

step-by-step explanation:

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)