Work and Power / Real Exam Questions with Correct Answers, A+ Score Solutions.Quiz____?A 5,400 W motor is used to do work. If the motor is used for 640 s, about how much work could it do?
8.4 J
4,800 J
6,000 J
3,500,000 J -
Answer✓✓
3,500,000 J
Quiz____?How do the units of work and power compare?The unit for work is a watt. The unit for power is a joule, which is a watt-second.The unit for work is a watt. The unit for power is a joule, which is a watt per second.The unit for work is a joule. The unit for power is a watt, which is a joule-second.The unit for work is a joule. The unit for power is a watt, which is a joule per second.- Answer✓✓ The unit for work is a joule. The unit for power is a watt, which is a joule per second.Quiz____?A force of 75 N at an angle of 15° to the direction of motion moves a chair 3 m.Which change would result in more work being done on the chair?using 60 N of force moving the chair 2 m increasing the angle to 20° decreasing the angle to 10° - Answer✓✓ decreasing the angle to 10° Quiz____?Examine the scenarios.
Scenario W: A force of 75 N moves a box 15 m.
Scenario X: A force of 100 N moves a box 12 m.
Scenario Y: A force of 50 N moves a box 20 m.
Scenario Z: A force of 25 N moves a box 45 m.
In which scenarios is the same amount of work done on the box?Page 1 of 5 1 / 2
W and X W and Z X and Y Y and Z - Answer✓✓ W and Z Quiz____?Natalia lifts a bag of groceries 0.50 m by exerting a force of 36 N. How much work did she do on the bag?
- J
18 J 36 J
72 J -
Answer✓✓ 18 J Quiz____?In which scenario is the least amount of work done on a crate?A force of 120 N moves it 25 m.A force of 115 N moves it 26 m.A force of 130 N moves it 22 m.A force of 125 N moves it 27 m. - Answer✓✓ A force of 130 N moves it 22 m.Quiz____?Brandi poses as Lady Justice for a skit in her government class. She holds a set of scales above her head with her right hand and a sword by her side in her left hand.She holds the pose for 10 minutes. At the end of the skit, she mentions to her friend that it was a lot of work to pose and that her arms were really tired.Which best summarizes Brandi's statement about doing work while posing?She did no work because she did not exert any forces on objects.She did more work using her right hand than her left because her right hand was higher.She did no work because she did not move the scales or sword while she posed.She did work the entire time she posed because she was tired at the end. - Answer✓✓ NOT She did work the entire time she posed because she was tired at the end.NOT She did more work using her right hand than her left because her right hand was higher.Quiz____?Trevor is pulling his younger brother in a wagon. He pulls the wagon 50 m to the corner with a force that is parallel with the ground. He then turns the wagon around Page 2 of 5
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