Friction

What is the unit of measurement for friction?

• Pascals (Pa)

• Joules (J)

• Newtons (N)

• Watts (W)

What is static friction?

• Static friction is the force that keeps an object at rest from moving.

• Static friction is the force that opposes the motion of an object in motion.

• Static friction is the force that acts on an object moving in a circular path.

• Static friction is the force that increases with the speed of an object.

What is the effect of weight on friction?

• More weight decreases the frictional force between two surfaces.

• More weight has no effect on the frictional force between two surfaces.

• More weight increases the frictional force between two surfaces.

• More weight only affects friction on rough surfaces.

How does friction affect speed?

• More friction increases speed.

• More friction decreases speed.

• Friction has no effect on speed.

• Friction only affects speed on smooth surfaces.

How does surface texture affect friction?

• Rough surfaces create more friction than smooth surfaces.

• Smooth surfaces create more friction than rough surfaces.

• Surface texture has no effect on friction.

• Friction is only affected by the weight of the objects.

What is friction?

• A force that accelerates an object when it comes into contact with another surface.

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

• A type of energy that is released during motion.

• A force that increases the speed of an object in motion.

What is an example of trying to increase friction?

• Spreading sand onto an icy road.

• Applying oil to a surface.

• Using a smooth surface for traction.

• Wiping a surface with a wet cloth.

True or False: Without friction, an object in motion would never stop.

• True

• False

• It depends on the object's mass.

• It depends on the speed of the object.

What is kinetic friction?

• Kinetic friction is the force that opposes the motion of an object that is already moving.

• Kinetic friction is the force that accelerates an object in motion.

• Kinetic friction is the force that acts on an object at rest to keep it stationary.

• Kinetic friction is the force that increases the speed of an object in motion.

Why is friction important in everyday life?

• Friction is important because it allows us to walk, drive, and hold objects without slipping.

• Friction is only a hindrance and should be minimized in all activities.

• Friction is necessary for creating electricity in machines.

• Friction helps in reducing the speed of moving objects to prevent accidents.