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# Newtons Laws of Motion

Newton was born on January 4, 1643 in Woolsthorpe, Lincolnshire. Deciding he didn't want to become a farmer like his father who died three months before Newton was born.  Later in 1661 he went to Cambridge University where he became interested in optics, physics, mathematics, and astronomy. From there Newton worked his way to becoming one of the worlds greatest scientists creating the Newtons Laws of motion.

## Newtons First law of motion

According to Newtons first law of motion an object that is at rest will stay at rest unless an external force acts upon it. An object that is in motion will not change its velocity unless an external force acts upon it.

• The acceleration of an object depends on its mass.
• The more the mass an object has or the more inertia it has, the harder it is to accelerate.
• More mass means less acceleration if the force acting on the object is the sane.
• A change in motion occurs only if a net force is exerted on an object.

For Example:

## Newtons second law of motion

According to Newtons second law of motion force of an object is equal to its mass times its acceleration.

• A change in motion occurs only if a net force is exerted on an object.
• More mass means less acceleration if the force acting on the object is the same.
• If an object is acted upon by a net force, the change in the velocity will be in the direction of the net force.
• The acceleration of an object depends on its mass.

For Example:

Newtons Second Law of Motion

## Newtons third law of motion

According to Newtons third law of motion every action there is an equal and opposite reaction.

• The force exerted by the first object is the action force.
• The force exerted by the second object is the reaction force.
• When one object exerts on a second object, the second object exerts an equal force in the opposite direction on the first object.

For Example:

Understanding third law of motion by a rocket