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- 1. Multiple Choice
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
- 2. Multiple Choice
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
- 3. Multiple Choice
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
- 4. Multiple Choice
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
- 5. Multiple Choice
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
- 6. Multiple Choice
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
- 7. Multiple Choice
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
- 8. Multiple Choice
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
- 9. Multiple ChoiceHow much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?15 J45 J0 J5 J
- 10. Multiple ChoiceIn which of the following situations do your arms do work on books?holding a heavy stack of books while standingcarrying a heavy stack of booksdropping a stack of books onto a tablepicking up a pile of books from the floor
- 11. Multiple ChoiceWhat unit do we use for measuring power?WattsJoulesNewtonsft/lbs
- 12. Multiple ChoiceWhat is the difference between calculating power and work?Power takes into account the time it takes to complete a taskWork takes into account the time it takes to complete a taskPower is force/areaWork is force/area
- 13. Multiple Choice
Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4,000 N. Mr. P's class pulled to the left with a force of 5,000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?
4100 J
3100 J
5100 J
45900 J
- 14. Multiple ChoiceHow much work is done carrying a 10-N box horizontally across a floor for 8 m?80 J10 J8 J0 J
- 15. Multiple Choice
You do work against gravity when you walk up some stairs.
True
False
- 16. Multiple ChoiceHow are work and energy related?The work done by an external force acting on an object causes a change in the mechanical energy of the object.Work is the same thing as energy. They are equal.Energy is m*g*h, and work is 1/2*m*v2
- 17. Multiple ChoiceWhenever work is done, energy changesLaw of Conservation of EnergyWork-Energy TheoremNewton's Fourth LawEfficiency
- 18. Multiple Choice
The force used in the work equation has to always be acting in the same direction as the movement of the object.
True
False
- 19. Multiple ChoiceGroot rescues Rocket from the bottom of a deep pit. Groot expends 1000 J of energy lifting Rocket who has a mass of 50 kg out of the pit. How deep is the pit?0.5 m2 m4 m10 m
- 20. Multiple Choice
The area under a force vs. displacement graph tells you the
mass of the object
momentum of the object
work done on the object
impulse of the object
- Answer choicesTagsAnswer choicesTags