Regents Physics Work and Power

What is work?

• A push or pull.
• When the object moves in the same direction in which the force is exerted.
• A change in energy.
• The rate at which energy is transferred.

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Two factors that determine work are

• size of the force, and distance
• size of the force, and type of force
• mass, and distance

Work done = Force x _________

• a. distance

• b. acceleration

• c. velocity

• d. speed

The correct work triangle is

• 
• 
• 

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

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The SI Unit for Force

• Newton (N)
• Joule (J)
• Second (s)
• Watt (W)

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The SI Unit for distance

• Newton (N)

• Joule (J)

• Meter (m)

• Watt (W)

George carries a box 6 meters to the right. Find the work done by the man on the 15 kg box.

• 900 Joules

• 0 Joules

• 90 Joules

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Which situation is work not done?

• lifting a 20 pound box off the floor
• holding a 20 pound box above the floor
• sliding a 20 pound box across the floor
• sliding a 20 pound box up an inclined plane

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

• 1500 N
• 15 N
• 1.5 N
• 150 N