Question

Q1. State the three laws of motion write mathematical form of each of them​

Answer 1

1.every object moves in a straight line unless acted upon by a force

Answer 2

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Newton's 1st law :-

Newton's first law states that a body stays at rest if it is at rest and moves with a constant velocity unit if a net force is applied on it. Newton's second law states that the net force applied on the body is equal to the rate of change in its momentum.

• F = ma

• or F = m(v-u) / t

• or Ft = mv - mu

That is, when F = 0, v = u for whatever time, t is taken. This means that the object will continue moving with uniform velocity, u throughout the time, t. If u is zero than v will also be zero, i.e., object will remain at rest.

Newton's second law :-

In equation form, Newton's second law of motion is

• a=Fnetm a = F net m .

This is often written in the more familiar form: Fnet = ma. The weight w of an object is defined as the force of gravity acting on an object of mass m.

The object experiences an acceleration due to gravity g: w = mg.

Newton's third law :-

It asserts that "If body A exerts a force on body B, then B exerts a force of equal size and opposite direction on A." It can be written:

• FAB = – FBA.

• This establishes Newton's third law. Restating this may make it clearer. Any force can be decomposed into two parts.