WorksheetsForces
Total questions: 10
Worksheet time: 7mins
Friction is a contact force that acts _______ to the surfaces in contact.
parallel
perpendicular
equal
at an acute angle
When an object is moving, friction acts in the _______ direction as the motion.
perpendicular
same
opposite
precise
The magnitude of the friction force depends on the force pushing the surfaces together.
True
False
The type of friction that prevents an object from moving is called _______ friction.
rolling
fluid
kinetic
static
A type of friction that occurs when air pushes against a moving object it to decelerate.
surface area
air resistance
velocity
gravity
How would the absence of friction affect the motion of a marble on a long, straight path?
The marble's speed would decrease.
The marble's speed would remain constant.
The marble's speed would increase.
The marble would stop immediately.
Polishing two surfaces in contact will reduce the friction between them.
True
False
Which of the following is an example of rolling kinetic friction?
A box sliding across the floor.
A car skidding to a stop.
A soccer player making a slide tackle.
A bike being ridden on a road.
The equation for the force of friction is _______.
Ff = µFg
Ff = µFN
Ff = µFT
Ff = µFs
What affect would decreasing the normal force between two objects have on the force of friction?
The force of friction would increase.
The force of friction would decrease.
The force of friction would remain the same.
The force of friction would disappear completely.
