Quiz #9 Practice Circular motion

When speed increases, what happens to the value of torque?

• increases
• decreases
• stays constant

What is the Unit for Torque

• Nm
• N
• W
• J

What is the unit for work?

• J
• Nm
• N
• W

When you lift an object up, the work that you put into the object is stored as

• Kinetic Energy
• Potential Energy
• Efficieny
• Mechanical Advantage

In a lawn mover the blades that cut the grass are which type of simple machine?

• wedge
• pully
• Wheel and axle
• screw

A wrench is used to tighten a nut. A 15N perpendicular force is applied 0.50 meters away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?

• 7.5 Nm
• 1.5 Nm
• 750 Nm
• 150 Nm

Which of the following does not have stored energy?

• A stretched spring
• A battery
• A rock help up at a height of 10m
• A rolling ball

Which of the following depict the speed of the blowing ball?

• A
• B
• C
• D

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 relationship exists between the radius of a circle and the centripetal acceleration?

• direct
• inverse
• exponential
• inverse squared