AP Physics - Work and Power

Renatta Gass is out with her friends. Misfortune occurs and Renatta and her friends find themselves getting a workout. They apply a cumulative force of 1080 N to push the car 218 m to the nearest fuel station. Determine the work done on the car.

• 2.35 x 10⁵ J

• 2.05 x 10⁵ J

• 1.35 x 10⁵ J

• 3.25 x 10⁵ J

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NGSS.HS-PS3-1

Hans Full is pulling on a rope to drag his backpack to school across the ice. He pulls upwards and rightwards with a force of 22.9 Newtons at an angle of 35 degrees above the horizontal to drag his backpack a horizontal distance of 129 meters to the right. Determine the work (in Joules) done upon the backpack.

• 2.42 x 10³ J

• 2.22 x 10³ J

• 3.12 x 10³ J

• 1.84 x 10³ J

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NGSS.HS-PS3-1

Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground.

• 2.6 x 10³ J

• 4.8 x 10³ J

• 1.5 x 10³ J

• 3.7 x 10³ J

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NGSS.HS-PS3-1

During the Powerhouse lab, Jerome runs up the stairs, elevating his 102 kg body a vertical distance of 2.29 meters in a time of 1.32 seconds at a constant speed. Determine the work done by Jerome in climbing the stair case.

• 2.30 x 10³ J

• 2.35 x 10⁵ J

• 2.42 x 10³ J

• 2.6 x 10³ J

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NGSS.HS-PS3-1

During the Powerhouse lab, Jerome runs up the stairs, elevating his 102 kg body a vertical distance of 2.29 meters in a time of 1.32 seconds at a constant speed. Determine the power generated by Jerome.

• 1.73 x 10³ W

• 1.48 x 10³ W

• 1.91 x 10³ W

• 1.27 x 10³ W

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NGSS.HS-PS3-1

NGSS.HS-PS3-2

A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to exert an average force of 890 N to push large crates a distance of 12 meters in 22 seconds. Determine the power output required of such a motor.

• 490 Watts

• 40. Watts

• 11 x 10³ Watts

• 0.55 Watts

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NGSS.HS-PS3-1

NGSS.HS-PS3-3

The Taipei 101 in Taiwan is a 1667-foot tall, 101-story skyscraper. The skyscraper is the home of the world’s fastest elevator. The elevators transport visitors from the ground floor to the Observation Deck on the 89th floor at speeds up to 16.8 m/s. Determine the power delivered by the motor to lift the 10 passengers at this speed. The combined mass of the passengers and cabin is 1250 kg.

• 2.06 x 10⁵ W

• 6.19 x 10⁶ W

• 2.10 x 10⁴ W

• 3.45 x 10⁵ W

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NGSS.HS-PS3-1

NGSS.HS-PS3-3

Sheila has just arrived at the airport and is dragging her suitcase to the luggage check-in desk. She pulls on the strap with a force of 190 N at an angle of 35° to the horizontal to displace it 45 m to the desk. Determine the work done by Sheila on the suitcase.

• 7.0 x 10³ J

• 4.9 x 10³ J

• 8.5 x 10³ J

• 3.1 x 10³ J

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NGSS.HS-PS3-1

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

In which of the following situations do your arms do work on books?

• holding a heavy stack of books while standing
• carrying a heavy stack of books
• dropping a stack of books onto a table
• picking up a pile of books from the floor