Grade 3 Physics Quiz: Force

What is friction?

• Friction is the force that opposes the motion of an object when it comes into contact with another object or surface.

• Friction is the force that only affects stationary objects

• Friction is the force that attracts objects to each other

• Friction is the force that helps the motion of an object

How does friction help in walking?

• Friction provides grip between the feet and the ground

• Friction has no impact on walking

• Friction makes walking more difficult

• Friction reduces the grip between the feet and the ground

Name one example where friction is helpful.

• Sliding on ice

• Pushing a heavy object

• Running on a treadmill

• Stopping a car

Explain the purpose of a force meter.

• To determine the color of an object

• To measure the amount of force applied to an object

• To measure the temperature of an object

• To calculate the speed of an object

How is force measured using a force meter?

• By using a spring or stretchy material that moves when a force is applied

• By using a stopwatch to measure the force

• By using a ruler to measure the force

• By using a thermometer to measure the force

What happens when you increase the force on an object?

• It will stay still

• It will slow down

• It will disappear

• It will accelerate or move faster.

How can you decrease friction between two surfaces?

• Use lubricants

• Apply more pressure between the surfaces

• Use sandpaper on the surfaces

• Increase the weight of the objects

Explain how you can increase friction between two surfaces.

• Apply lubricant to the surfaces

• Roughen the surfaces or increase the force pressing the surfaces together

• Decrease the force pressing the surfaces together

• Polish the surfaces to make them smoother

What are the effects of changing friction on the movement of objects?

• It can either increase or decrease the movement of objects.

• It has no effect on the movement of objects.

• It only decreases the movement of objects.

• It only increases the movement of objects.