Ch. 14 Work, Power, Mechanical Advantage

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

A force exerted over a distance to move an object is ______________________.

• power
• work
• momentum
• Watt

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

• doing homework

• lifting a box up from the ground

• pushing against a closed door

• holding a box high above your head

 Work = Force x _________

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

Work is done on an object when the object moves in the SAME direction in which the force is applied.

• True
• False

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

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

• 70 J
• 1750 J
• 355 J
• 175 J

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

• 15 J
• 45 J
• 0 J
• 5 J

Which of the following is an example of work being done?

• Holding weights above your head

• Book resting on desk
• Keys hanging from a key chain
• Pushing a ball on the floor

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter