Inertia and Momentum Quiz

Which of the following best describes Newton's First Law of Motion?

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• The force acting on an object is equal to the mass of the object times its acceleration.

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

• The acceleration of an object is directly proportional to the net force acting on it.

What is the principle of conservation of momentum?

• Momentum is always conserved in elastic collisions only.

• The total momentum of a closed system remains constant if no external forces act on it.

• Momentum can be created or destroyed in a closed system.

• Momentum is conserved only in inelastic collisions.

Calculate the linear momentum of a 5 kg object moving at a velocity of 3 m/s.

• 8 kg·m/s

• 15 kg·m/s

• 20 kg·m/s

• 25 kg·m/s

Which of the following is true about mass and weight?

• Mass is a force, while weight is a measure of inertia.

• Mass is measured in newtons, while weight is measured in kilograms.

• Mass is constant, while weight varies with the gravitational field.

• Mass and weight are the same and can be used interchangeably.

Which of the following scenarios demonstrates Newton's First Law?

• A ball rolling on a flat surface eventually stops due to friction.

• A rocket launching into space.

• A car accelerating on a highway.

• A person pushing a stationary box.

A 10 kg object is at rest. What is its momentum?

• 0 kg·m/s

• 10 kg·m/s

• 100 kg·m/s

• 1000 kg·m/s

Which of the following units is used to measure momentum?

• Newton

• Joule

• Kilogram metre per second

• Watt

If a 2 kg object is moving at 5 m/s, what is its momentum?

• 5 kg·m/s

• 10 kg·m/s

• 15 kg·m/s

• 20 kg·m/s

What happens to the momentum of an object if its velocity doubles?

• The momentum remains the same.

• The momentum doubles.

• The momentum triples.

• The momentum quadruples.

Which of the following is an example of mass?

• 10 newtons

• 5 kg

• 15 m/s

• 20 joules