Question

A monkey hangs stationary at the end of the vertical vine. What forces act on the monkey?

Answer 1

When a monkey is hanging on a vertical vine, the gravitational force of the earth is pulling him downwards.

But the upward force of tension of the vine helps him to prevent the fall and stay there hanging at the end of the vine.

Since the monkey is at a stationary position, there is no other force acting on him at that point of time.

Moreover, the equal amounts of gravitational force and upward tension help him acquire a static equilibrium at that position.

Answer 2

1. Both gravitational and frictional forces act on monkey.
2. If both forces are equal (or) if the friction is greater than gravity the monkey remains on the vine.
3. However if gravity overcomes the force the friction, the monkey slides down the vine