Test: Force & Pressure- 2

The force applied on an object in same direction as the object is moving add the speed of the object but when applied in opposite direction, its reduces.

Force is a vector quantity as it contains both direction and magnitude but strength of a force is usually expressed by its magnitude.

When force is applied to any object it may change its direction eg.foot ball it may change its shape eg dough it may change its state it may change its motion.

Muscular force enables us to perform all activities involving movement or bending of our body. Muscular force is developed inside muscle due to presence of contractile protein.

When two force acts on opposite direction then the net force will be obtained by subtracting them while if the forces acts in the same direction then the net force will be obtained by adding them.

The forces in which to bodies acting on each other are in contact are called contact force. Muscular force is an example of contact force.

The force resulting due to the action of muscles is known as the muscular force. Muscular force is present in all animals including human beings.

The force responsible for changing the state of motion of objects is called friction. Friction force is an example of contact force in which two moving bodies are in contact.

Electrostatic force is exerted by charged body on another charged body or uncharged body. Two charged body having same kind of charge repels each other.

Like poles of magnet repels each other while unlike poles of two magnet attract each other.

Friction arises due to contact between two surfaces. Friction force is more in case of solid body and less in case of gases.

A force has both magnitude and direction so, force is a vector quantity. Force can change state and shape of body.

Gravitational force is acting on earth, moon and on all other planet. This force is acting on all the body having some mass.

Force applied on inflated balloon is an example that shows that force can change shape and size of object.

The speed of moving ball increase further if force is applied in direction of motion and decrease if force is applied in opposite direction.

The force exerted by a charged body on another charged or uncharged body is known as electrostatic force. Electrostatic force is non-contact force.

The tendency of a body to maintain its state of rest or uniform motion is called inertia. Mass is the measure of inertia.

1 kg-wt is the amount of force experienced by an object of mass 1 kg due to its own weight and is equal to 9.8 N when acceleration due to gravity is 9.8 m/s².

Gravitational force is one of the most fundamental forces of nature. It causes objects to attract each other . It is a conservative type of force . The gravitational force is independent of the intervening medium.It is one of the weakest force of the nature.