Friction Quiz

What is friction?

• Force that supports motion

• Force that causes motion

• Force that has no effect on motion

• Force that opposes motion

Name the four subtopics of friction.

• static friction, sliding friction, rolling friction, and fluid friction

• kinetic friction, dynamic friction, surface friction, and air friction

• frictional force, normal force, gravitational force, and tension force

• slip friction, stick friction, rolling resistance, and viscous friction

Which type of friction occurs when an object is in motion?

• fluid friction

• kinetic friction

• rolling friction

• static friction

Which type of friction is generally greater, static or kinetic friction?

• static

• rolling

• dynamic

• kinetic

What is the force that opposes the motion of an object due to friction called?

• counter force

• frictional force

• opposing force

• resistant force

What is the formula to calculate the force of friction?

• force of friction = mass * acceleration

• force of friction = velocity * time

• force of friction = coefficient of friction * normal force

• force of friction = weight * distance

What are some examples of static friction in everyday life?

• pushing a heavy box across the floor, opening a door, driving a car on a dry road

• sliding on ice, riding a bike, swimming in water

What are some examples of kinetic friction in everyday life?

• Rubbing hands together, Sliding a book on a table, Brakes on a car, Riding a bike on a smooth road, Using a marker on a whiteboard

• Rubbing hands together, Sliding a book on a table, Brakes on a car, Walking or running on the ground, Using a pencil eraser

• Rubbing hands together, Sliding a book on a table, Brakes on a car, Swimming in a pool, Using a pencil on a whiteboard

• Rubbing hands together, Sliding a book on a table, Brakes on a car, Walking on water, Using a pen on paper

Friction is a force that acts in a direction ___________ of movement.

• similar

• opposite

• parallel

• perpendicular

A hockey puck slides on ice at a constant velocity. What is the net force acting on the puck?

• Zero
• Equal to its weight
• Less than its weight but greater than zero
• Depends on the speed of the puck