Work and Power

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

A force exerted over a distance to move an object in the direction of the applied force is ______________________.

• power
• work
• momentum
• Watt

The efficiency of a machine can be increased by reducing __________________________. 

• effort
• resistance friction
• fulcrum
• friction

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

Which of the following is the best example of work being done. 

• doing homework
• lifting a box
• pushing a stationary box
• holding a box

No machine in existence has 100% efficiency due to ____________________.

• magic
• friction
• smoke
• input

A 5000N block is lifted 10 m. How much work was done?

• 50000 J
• 5000 J
• 500 J
• 50 J

 Work done = Force x _________

• a. distance
• b. acceleration
• c. velocity
• d. speed

How much work is produced when 350 N is used to move a car 5 m?

• 70 J
• 1750 J
• 355 J
• 175 J

In which of these cases is work being done? 

• A student sleeps
• A student pushes a locked door that does not move
• a student carries his chair into another room
• A student sits on the carpet