Question

A body of mass m is being pulled by the string of mass m with a force p is applied at one end.the force exerted by the spring on the body will be:​

Answer 1

Explanation:

For the string of mass 'm',

P−mg−F=ma

For the body of mass M,

F−Mg=Ma

Adding, we have:

p−mg−Mg=Ma+ma

⟹a= P - g

M+m

Force exerted by string on the body F=M(g+a)

Substituting the value of a in it, we have:

F=M(g+ PM - g)

M+m

⟹F = PM

M+m