Question

If string is pulled with acceleration of 2 m/s? then
acceleration of block is.
2m/s
(1) 4 m/s2
(3) 1 m/s2
(2) 2 m/s2
(4) 8 m/s2​

Answer 1

If string is pulled with acceleration of 2 m/s? then  acceleration of block is 1 m/s^2.

Option (3) is correct.

Explanation:

If string is pulled with acceleration of 2 m/s. Then  acceleration of block is 1 m/s^2.

Formula for net force is given as:

F (net)  = F (upwards) - F (downwards)  

Acceleration form this formula can be find as:

Acceleration = F net / m

If the block is moving in upward direction then the value of acceleration will be negative. The negative sign only shows direction.