Exploring Gravity and Forces Quiz

Which of the following is Newton's First Law of Motion?

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

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

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

What is the force that opposes the motion of objects sliding against each other?

How is weight different from mass?

• Weight is a measure of the amount of matter in an object, while mass is the force exerted by gravity.

• Mass is a measure of the amount of matter in an object, while weight is the force exerted by gravity on that object.

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

Which of the following is an example of a balanced force?

• A car accelerating on a highway.

• A book resting on a table.

• A ball rolling down a hill.

• A person pushing a stationary wall.

What happens to an object when unbalanced forces act on it?

• It remains at rest.

• It changes its state of motion.

• It moves in a circular path.

• It stays in uniform motion.

Which of the following is a type of contact force?

• Gravitational force

• Magnetic force

• Frictional force

• Electrostatic force

What is the net force acting on an object if two forces of 5 N and 10 N act in opposite directions?

Which of the following best describes gravity?

• A force that acts only on objects in motion.

• A force that pulls objects towards the centre of the Earth.

• A force that pushes objects away from each other.

• A force that acts only on objects with mass.

What is the effect of gravity on a falling object?

Which of the following is an example of an unbalanced force?

• A car parked on a flat road.

• A person standing still.

• A cyclist pedalling uphill.

• A book lying on a shelf.