Question

A body of mass 0.5 kg is hanging from a rigid support by a string find the force exerted by
1. The body on the string
2. The String on the body (g = 9.8 ms ^ -2)

Answer 1

First draw the figure , body hanging from a rigid support.

Concept:

• We can see here Tension in the string balances weight(mg) of mass to keep it in equilibrium.

$\implies\rm T = mg = 0.5\times 9.8 = 4.9\: N$

• Both tension and mg are action reaction forces exerted by mass and string respectively.
• 0.5 kg exerts mg force on string = Action
• string exerts tension force on 0.5 kg = Reaction

Solution:

1. The body on the string

Force exerted by body on string = mg

• mg = 4.9 N

2. The String on the body

Force exerted by string on the body = T

• T = 4.9 N

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