2.02 Quiz
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Which of the following is a scalar quantity?
work
A man carries a 10 kg sack of groceries in his arms with a force of 50 N as he walks forward a distance of 10 m. How much work has he done?
0 J
A rope pulls on a metal box at an angle of 60.0° with a force of 255 N. The box moves horizontally for 15.0 m. How much work was done on the box?
1,910 J
A man pushes on a box at an angle of 30.0° with a force of 20.0 N and the box moves across the floor. Which of the following forces do you use to calculate work?
17.3 N
In which of the following situations has the energy of the object been increased?
A boy pushes a lawn mower forward by pushing at a downward angle on the handle.