# Physics Assignment Help With Newton's Laws

## Newton's Laws

### Newton's First Law

When there is no net force on an object, an object at rest remains at rest, and an object in motion continues to move along a straight line with constant velocity.

### Newton's Second Law

We know from the first law, what happens when there is no unbalanced force on an object: *its velocity remains constant.* Now let us see *What happens when there is an unbalanced force on an object ? *The *Newton's second Law *gives the answer to this question, that is, *the **net* *force acting on a body will produce an acceleration.*

When there is a constant unbalanced force on an object, the object moves with a constant acceleration. Furthermore, if the force varies, the acceleration varies in direct proportion with larger forces producing larger accelerations. *Twice the force produces twice the acceleration* for the same body*.*

The magnitude of the acceleration produced depends on the *quantity of matter *being acted upon. The quantity of matter is referred to as the *inertial mass.*

*Newton**’s second law *states the relation between the *net force *and the *inertial mass.*

*m*

Note that the direction of

*acceleration*is in the direction of the net force.

In terms of components

S

*Fx*=

*max*S

*Fy*=

*may*S

*Fz*=

*maz*

### Newton's Third Law

If the object exerts a force *F *on a second, then the second object exerts an equal but oppositely force - *F* on the first.

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