Question

9.
Find tension in string and force on 3 kg block
the box (Take g = 10 m/s2).
8kg
4kg (box)
3kg (block)
9
ock)
​

Answer 1

Answer:

T = 74.67 N

Explanation:

8kg block will move downward and the box will go up .

let the acceleration of the system (8 kg block, box) is "a".

so,

let the tension in the string = T

8g - T = 8a ...........(1)

T - 7g = 7a .............(2)

adding both eqn (1) & (2),

a = g/15 ......

T = 7(a+g) = 7 × 16×10/15 = 224/3 = 74.67 N

T = 74.67 N