Question

Newton's first law of motion in very short
newton second law of motion in vert short
newton third law of motion in very short​

Answer 1

Newton’s First Law of Motion

The first law of motion simply means that things cannot start, stop, or change direction all by themselves.  It requires some force from the outside to cause such a change. This property of massive bodies to resist changes in their state of motion is called inertia. Newton’s first law is also known as the law of inertia.

Newton’s first law of motion states that “A body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it”. Suppose a block is kept on the floor, it will remain at rest until we apply some external force to it. Also, we know that it takes us more effort or force to move a heavy mass. This is directly related to the property known as Inertia. Hence, the first law of motion is also known as the law of inertia.

Newton’s Second Law of Motion

The second law of motion describes what happens to the massive body when acted upon by an external force.  The law states that the force acting on the body is equal to the product of its mass and acceleration.

When a constant force acts on a body, the forces result in the acceleration of the body.  However, if the object is already in motion, or if this situation is viewed from a moving frame of reference, the body might appear to speed up or slow down or change its direction depending on the direction of the force.

Mathematically, we express the law as follows:

f ∝ $\frac{dP}{dt}$

⇒ f ∝ mv−mut

⇒ f ∝ m(v−u)t

⇒ f ∝ ma

⇒ f = kma

Where k is the constant of proportionality and it comes out to be 1 when the values are taken in SI unit. Hence the final expression will be,

F=ma

Newton’s Third Law of Motion

The third law of motion describes what happens to the body when it exerts a force on another body. The law states that when two bodies interact, they apply force on each other that are equal in magnitude and opposite in direction.  A force resting on a table applies a downward force equal to its weight on the table. According to Newton’s third law, the table applies an equal and opposite force on the book. This force occurs because the book slightly deforms the table, as a result, the table pushes back on the book like a coiled spring. Newton’s third law of motion implies the conservation of momentum.

Answer 2

Explanation:

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