What is the difference between Newton's first law and second law?

Answer 1

To recap, Newton's first law states that an object in motion will stay in motion with constant velocity given that there are no net forces acting upon it. For example, if a ball was pushed with zero net forces acting on it besides the first force push, it will go on forever until a force decides to act on it, such as friction or gravity. Contrary to Newton's first law, Newton's second law implies that if an object is acted upon with existing net force, the object will accelerate with the same direction.

The equation Force (F) = mass (m) x acceleration (a) derives from the second law. Similarly to the first law, any net force on a body is conserved, implying the rule of conservation of momentum. In the first law, a force acted on a body will cause the body to move with the same magnitude of force in the same direction if there is zero net force. In the second law, a net force on a body causes the body to accelerate with the same direction as the net force.

Answer 2

Newton's 1st law states that objects in motion stay in motion, and objects at rest stay at rest, unless an external force is applied.

Newton's 2nd law calculates an object's mass (m), accelaration (a), and the applied force (F): F = ma.

These 2 laws relate as such: in order for an object to have motion (a), there must be an external force applied. So if the force (F) is never applied to the object's mass (m), there won't be accelaration (a).

Answer 3

Newtons first law is the principle of inertia and Newtons second law is F=MA.

Answer 4

The First Law is simply a special case of the Second Law - the case where the net force is equal to zero.

Answer 5

The First Law is simply a special case of the Second Law, for the case that there is no force.