- #1

- 23

- 0

**Question**:

A weightless pulley is attached to the top of an inclined plane which makes an angle of 30degree with the horizontal.Masses A and B,each of mass 1kg,are joined by an inextensible string passing over the pulley.Neglecting frictional forces,calculate the accleration of the masses and the tension in the string.(Shows working thanks)

**My working**:

let m2 be mass of b,m1 be mass of a.Assuming acceleration due to gravity to be 10m/s².

m2g - T = m2a ---(1)

T - sin30m1g = m1a ---(2)

Substituting the values from the question,i have

From (1): 10-T=a ---(3)

From (2): T-5=a ---(4)

Substitute (3) into (4):

T=7.5N

Substituting T into (3),

a=2.5m/s²

**Further Details**

The answers given to me was 2.5m/s² for acceleration and 75N for tension.

Is the answers correct?

If yes,any clues to get 75N?

Thanks for replying.Appreciates it.

Last edited: