14/1 Newton's Laws of Motion

Newton's first law of motion is also known as the law of:

• Gravity

• Inertia

• Acceleration

• Action-Reaction

Newton's second law of motion is also known as the law of:

• Inertia

• Mass and acceleration

• Action and reaction

• Gravitation

Newton's third law of motion is also known as the law of action and reaction. What does it state?

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

• An object in motion stays in motion unless acted upon by an external force.

• Force equals mass times acceleration.

• Energy cannot be created or destroyed.

Another name for the first law of motion is the law of (a)   .

Newton's first law applies when you kick a football on a football field. What does this law state?

• An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.

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

• Force equals mass times acceleration.

• Energy cannot be created or destroyed.

If you kicked a ball in space, according to Newton's first law, what would happen?

• The ball would stop immediately.

• The ball would continue moving in the same direction at a constant speed.

• The ball would change direction randomly.

• The ball would fall back to the kicker.

Newton's first law explains the need for seatbelts and airbags in cars because:

• They provide comfort during driving.

• They help maintain the car's speed.

• They protect passengers by counteracting inertia.

• They enhance the car's fuel efficiency.

What does Newton's second law of motion state about acceleration?

• It is produced when a balanced force acts on an object.

• It is produced when an unbalanced force acts on an object.

• It is not related to force.

• It is constant regardless of force.

According to Newton's second law, if you use the same force to push a lorry and a car, which one will have a greater acceleration?

• Lorry

• Car

• Both will have the same acceleration

• None of the above

It is easier to push an empty shopping trolley than a full one because:

• an empty trolley has less mass and requires less force to move.

• a full trolley has more mass and requires less force to move.

• an empty trolley has more friction with the ground.

• a full trolley has less friction with the ground.