State of motion is described by

In the circuit shown in figure, when the circuit is completed, the hammer strikes the gong. Which of the following force is responsible for the movement of hammer?

Which one of the following forces is a contact force?

Force is due to

Some mustard oil is kept in the beaker. It will exert pressure

To draw water from a well, we have to _______ the rope.

To move a loaded trolley, we have to __________ it.

An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information, fill up the gaps in the following statements using the following terms:
( muscular, contact, non-contact, gravity, friction, shape, attraction )
The force applied by the archer to stretch the bow is an example of __________ force.

An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information, fill up the gaps in the following statements using the following terms:
( muscular, contact, non-contact, gravity, friction, shape, attraction )
While the arrow moves towards its target, the forces acting on it are due to _________ and that due to __________ of air.

Draper and rubber sucker work on the principle of ____________ pressure.

Only the earth exerts gravitational force.

Muscular force and frictional force are the examples of non-contact forces.

If two forces act in opposite directions, then net force is the difference between the two forces.

In 'tug of war' when both the teams apply equal pulling force then net force is maximum.

Liquids and gases do not exert pressure on the walls of the container.

A ball of dough is rolled into a flat chapati. Name the force exerted to change the shape of the dough.

A girl is pushing a box towards East direction. In which direction should her friend push the box so that it moves faster in the same direction?

Fruits detached from a tree fall down due to the force of gravity. We know that a force arises due to interaction between two objects. Name the objects interacting in this case.

Name an activity which does not involve any pushing force.

What is a force?

Give two examples each of situations in which you push or pull to change the state of motion of objects.

Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss, why the forces acting on the bucket do not bring a change in its state of motion.

Figure shows a man with a parachute. Name the force which is responsible for his downward motion. Will he come down with the same speed without the parachute?

Determine the pressure when a force of 200 N acts on area 20 m²

Briefly explain the concept of variation of atmospheric pressure.

Observe the vessels A, B, C and D as shown in figure carefully.

Volume of water taken in each vessel is as shown. Arrange them in the order of decreasing pressure at the base of each vessel. Explain.

Amit and Sumit were good friends. They both went to gym center for exercise. As, the coach of gym told them to complete 10 dips each. So, Amit started doing it by stretching the palms on the floor while Sumit opted to do the same job on pair of rods at some height from floor.
(a) Amit got less pain while Sumit got more pain on his palm. Why?
(b) Mention the idea used by Amit here.

What are contact and non-contact forces? Explain briefly with suitable examples.