Work Done

Which of the following situations shows that WORK is done on an object?

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• 
• 
• 

It is the ability of an object to perform work.

• Energy

• Force

• Power

What is the SI unit of work?

• Joule

• Newton

• Pascal

• Watt

How much work is done on an object if the amount of force applied is 50 N and the object was displaced by 2 meters from its original position?

• 100 J

• 25 J

• 100 W

• 25 W

Energy in the form of motion.

• mechanical energy

• potential energy

• kinetic energy

• momentum

True or false: when the distance an object moves is zero the work done on the object is also zero.  

• True
• False

In which of the following is no work done

• climbing stairs
• lifting a book
• pushing a shopping car
• none of the above

What is the formula for work done?

• W = FD

• F = WD

• D = WF

• W = D/F

No work is actually done, on the tray.

Explain why.

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If 150 Joules of work is needed to move a box 10 m, what force was used?

• 1500 N

• 15 N

• 1.5 N

• 150 N