Question

Hey All!

Question:

A man A 30 kg standing on a plateform and holding a string. If plateform, strings and pulley are light , find the force man needs to exert on string he is holding to keep himself at rest on plateform.

I need Solution!!!​

Answer 1

Answer:

Let the tension force be T in the rope. The downward forces acting on the system of the man and the box are the weight of the man and the weight of the box. The upward forces are T and T on each side of the rope.

As the system is in a static equilibrium:

T+T=(60+30)g

=>T=45kgf or 45g Newtons=450N if g=10m/s

2

The forces acting on the man are: Tension T, reaction from the weighing machine, and weight 60 g. So,

Normal−reaction of the weighing machine =60−T=15kgf.

You can do this question like this

Hope it helps

Answer 2

Answer:

Let the tension force be T in the rope. The downward forces acting on the system of the man and the box are the weight of the man and the weight of the box. The upward forces are T and T on each side of the rope.

As the system is in a static equilibrium:

T+T=(60+30)g

=>T=45kgf or 45g Newtons=450N if g=10m/s

2

The forces acting on the man are: Tension T, reaction from the weighing machine, and weight 60 g. So,

Normal−reaction of the weighing machine =60−T=15kgf.