Force & Pressure Notes

• Forces that act on objects by direct or indirect physical contact are called contact forces.
• E.g. Applied or muscular forces and frictional force

Muscular Force:

• The force is caused by the action of muscles in our body. The force resulting due to the action of muscles is known as the Muscular force.
• It is the muscular force that enables us to perform all activities involving movement or bending of our body.

• Forces that do not need physical contact with the object on which they are acting are called non contact forces.
• E.g. Magnetic force, electrostatic force and gravitational force are the examples of non-contact force.

Gravitational Force:

A force can change the state of motion:

• Force can make a stationary object move or make a moving object move faster.
• A toy car can be made to move by giving it a little push. A stationary football can be made to move by giving it a small push.
• Thus, a force can make a stationary object move, and it can be also make an already moving object move faster.

Force can slow down or completely stop a moving object.