Question

A block of weight G is attached to the axis of a movable pulley. What force should be applied to the ends of the rope passing around the second fixed pulley for the block to move upwards with an acceleration a?

Answer 1

T = tension in the rope = force
T + T - G g = G a
So T = (g+a)G/2

See the picture.

Answer 2

Answer:

G here is weight therefore mass of object =G/g

Now , T+T - G =Ga/g

which gives us T = G(a+g)/2g

which is the force required to move the object upward with acceleration a

Explanation: