Question

A block a of mass 7kg is placed on a frictionless table, a thread tied to it passes over a frictionless pulley and carries a body b of mass 3 kg at the other end. the acceleration of the system is

Answer 1

For a body A :

Tension = Mass × acceleration

Let acceleration = a

Tension = ma = 7a

For a body B :

Force = Mass × acceleration

Ma = mg - T

3a = 3 × 10 - 7a

3a + 7a = 30

10a = 30

a = 30/10

a = 3 m/s²

Answer 2

Answer:

acceleration is 3 m/s²

Explanation:

for body A

t=ma

acceleration=a

t=7a

for body B

f=ma

ma=mg-t

3a=30-7a

10a=30

a=3m/s²