Newton's Laws and Forces

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by a net external force.

Front

What is Newton's Second Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

Define net force.

Back

The vector sum of all the forces acting on an object.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the gravitational force acting on that mass.

Front

How do you calculate force?

Back

Force can be calculated using the formula F = ma, where F is force, m is mass, and a is acceleration.

Front

If a 5 kg object accelerates at 3 m/s², what is the force applied?

Back

15 N (calculated using F = ma).

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

If two forces act in opposite directions, how do you find the net force?

Back

Subtract the smaller force from the larger force and apply the direction of the larger force.

Front

What happens to the net force if all forces acting on an object are balanced?

Back

The net force is zero, and the object remains in its current state of motion.