Question

If the speed of the pulley moving upward is 10m/s, find speed of block A.
(A) 10m/s (B) 20 m/s (C) 30m/s (D) none of the above.

Answer 1

Answer:

maybe 10m/s is the correct answer .

Answer 2

(A) 10m/s

Explanation:

Given: Speed of the pulley moving upward is 10m/s.

Find: Speed of block A.

Solution:

Mentioned that the pulley is moving upward at 10 m/s. There is no mention of a block B on the other end. So we assume that the only block attached to pulley is block A. In that case, the block A will move up at the same speed as the pulley as there is no other load on the other end to slow or fasten its speed.

So speed of block A = 10 m/s

Option A is the answer.