Contact Forces

The force that a solid surface exerts on any object in the normal direction is called:

A person is pulling water from well. Which type of force it is?

Hoisting a flag is related to _____.

Imagine that friction disappeared from Earth. What will happen ? Explain.

If you push a heavy box which is at rest, you must exert some force to start its motion. However, once the box is sliding you apply a lesser force to maintain that motion. Why?

How do you appreciate the role of friction in facilitating our various activities?

How can you differentiate between a contact force and a force at a distance?

Give two examples each for a contact force and force at a distance.

What is a force? What change can be produced by a force?