Work, Energy, and Machines Quiz

Kinetic energy depends on:

• Mass only

• Velocity only

• Both mass and velocity

• None of the above

A machine with MA > 1 means:

• Input force is greater than output force

• Output force is greater than input force

• No force advantage

• Cannot be determined

The unit of power is:

• Joules

• Newton-meters

• Watts

• Joules/second

For 100% efficiency:

• Work output = Work input

• Work output > Work input

• Work output < Work input

• None of the above

Energy losses reduce the:

• Efficiency

• Mechanical advantage

• Velocity ratio

• All of the above

Mechanical advantage compares the:

• Effort force and Load force

• Input work and Output work

• Velocity ratio and Efficiency

• None of the above

Potential energy is the energy possessed by an object due to its:

• Motion

• Position

• Temperature

• Vibration

Power is the rate of:

• Doing work

• Transferring energy

• Both a and b

• None of the above

If the same work is done in less time, the power is:

• Less

• More

• Same

• Unpredictable

For an ideal machine:

• MA = VR

• MA > VR

• MA < VR

• Cannot be determined