Question

what is the force applied on the earth by a 30 kg boy​

Answer 1

Given : a boy of 30kg stand on the earth,

To Find : the force exerted by earth on the boy is​

Solution :

Force  =  Mass * acceleration

=> F = ma

Mass m  =  30 kg

acceleration a = g   ( acceleration due to gravity )

F = mg

F = 30 g

g = 10 m/s²

=> F = 30 * 10

=> F = 300 N

force exerted by earth on the boy is 300 N

if g = 9.8 m/s²

Then F = 30 * 9.8  = 294 N

if g = 9.81 m/s²

Then F = 30 * 9.81  = 294.3 N

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