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What is a force?
• A push or a pull on an object is called force
• No one has tasted or felt a force .But we always see or feel the effect of the force
• Force are used in actions like stretching, pushing, pulling, lifting, twisting and pressing.
Balanced and unbalanced forces
forces are of two types:
Balanced & unbalanced
• To move a stationary object , we have to push it with a force greater than the opposite force of friction
• When an unbalanced force acts on a body it produces motion in the body.
• If there was no unbalanced force of friction & no air resistance, a moving object would go on moving for ever .
Unbalanced forces
laws of motion
force
Law of inertia
mass velocity
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