Types of Forces

Which force prevents a book from falling through a table?

• Gravity force

• Friction force

• Air resistance force

• Normal force

What is the standard unit force is measured in?

• Newtons
• pounds
• grams
• meters

In the diagram of the car, if the driver took his hands off the steering wheel, which arrow correctly shows the direction the car would travel in?

• A

• B

• C

• D

If F is force, k is spring constant and x is extension, Hooke's Law tells us that:

• F=k/x
• x=Fk
• k=Fx
• F=kx

A horse gallops around a circular arena.  The centripetal force on the horse is ___.

• directed outward
• tension
• directed toward the center of the arena
• 9.8 N

What force acts between two objects that have an electric charge?

• Gravitational force

• Frictional force

• Electrostatic force

• Tensile force

Which force keeps a ball hanging from a string?

• Gravity force

• Friction force

• Air resistance force

• Tension force

What force opposes the motion of a paraglider?

• Gravity

• Friction

• Air resistance

• Tension

Why should you reduce speed around a turn if the road is icy?

• Because your car will travel in a straight line unless forced to do otherwise

• Because the ice reduces the frictional force between the tires and the road.

• Because a minimum amount of centripetal force is required to keep your car moving around the curve.

• All of the above.

Which represents the acceleration of the ball?

• A
• B
• C
• D