Question

What are Newton's laws?

Answer 1

Newton's laws are given below:

Newtown's first law:

1. It states that Unless acted upon by a force, a body remains at rest or in motion at a constant speed in a straight line.
2. Consider a smooth-surfaced block. Smooth means that there is no friction on the surface. The block is at rest, which means that it is not moving.
3. Let us now look at the forces at work on the block.
4. The only forces acting on the block are gravity and the surface's normal reaction. It is not being acted upon in the horizontal direction. Because the forces in the vertical direction are equal in magnitude, they cancel each other out, and thus there is no external force acting on the block.
5. We can say that this block confirms Newton's first law of motion because it is at rest.

Newtown's second law:

1. It states that when a body is subjected to a force, the time rate of change of its momentum equals the force.
2. It can be written as $F=\frac{dp}{dt}$.
3. Riding a bicycle is a great example of this law of motion in action.
4. The mass is your bicycle. The force is generated by your leg muscles pushing on the pedals of your bicycle.
5. Your bicycle accelerates when you push on the pedals. By applying force to the pedals, you increase the speed of the bicycle.

Newton's third law:

1. Newtown's third law state that if two bodies exert forces on each other, the forces must be of equal magnitude but directed in opposite directions.
2. When we pull on an elastic band, it returns to its original position.
3. The more you pull, the more force is produced.
4. The same thing happens when you pull or compress a spring.
5. The action (applied force) is stored as energy and released as an equal and opposite force reaction.