Question

In the arrangement shown all pulleys and strings are ideal. A vertical downward force of 10N is needed to apply on block A to keep the system in equilibrium. If mass of B is 10kg then find the mass of A​

Answer 1

Explanation:

The tensions are correctly shown in the figure.

Now from the contraint relationship .

the accleration of mass A is half of that of B.

Hence2a

A

=a

B

from2a

A

=a

B

T−mg=ma

A

=m

2

a

B

fromFBDofmassA,

mg−

2

T

=ma

B

⇒a

B

=

5

2

g