Question

A block of weight W1 rests on a frictionless inclined plane of slope 30 degree. A flexible cord is attached to the right face of the block, crosses over a frictionless pulley and is attached to a second block of weight W2. The weight of the cord at the pulley is negligible. What is the value of W2?

Answer 1

The tension is

$$T=W_2$$

$$T=W_1 \sin{30}=0.5W_1$$

Thus,

$$W_2=0.5W_1$$