Question

Define laws of motion.​

Answer 1

There are three types of laws of motion :

1. Newton's first law of motion
2. Newton's second law of motion
3. Newton's third law of motion

★ Newton's First Law of Motion :

A body in rest will remain at rest,and a body in motion will continue in motion in a straight line with uniform speed, unless it is compelled by an external force to change its state or of uniform motion.

★ Newton's Second Law of Motion :

The rate of change of momentum is directly proportional to the applied force,and takes place in which the force acts.

★ Newton's Third Law of Motion :

Whenever one body exerts a force on another body,the second body exerts an equal and opposite force on the first body.

OR

To every action there is an equal and opposite reaction.

Answer 2

Answer:

Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to those forces.

First Law: An object in motion will stay in motion unless acted on by an unbalanced force. An object at rest will stay at rest unless acted on by an unbalanced force.

• Lets say a cup is sitting on a table, if you fall into that table and knock over the cup you are the unbalanced force acting upon the cup. The cup is at rest until you (the unbalanced force) acted upon it.

Second Law: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

• Say you are at the Supermarket. Its easier to push the empty shopping cart. Once the cart is filled you must exert more force to push it. This is because the empty cart has less mass than the full one.

Third Law: For every action, there is an equal and opposite reaction.

• A rocket has to fire its engines forcefully to overcome gravity and propel itself into outer space. The force of gas propelling downwards creates a reaction that pushes the rocket in the opposite direction with equal force. This is Newton’s third law: every action has an equal and opposite reaction.

• As a result of Newton’s third law, all forces come in pairs. When you push against solid ground with your foot, the ground doesn’t fly off —it pushes back against you. This law helps us understand how objects with different forces interact.