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WorksheetsWork, Power, and Energy
Total questions: 17
Worksheet time: 14mins
Which of the following best describes work?
product of force and displacement
energy consumed per unit time
push or pull on an object
ability to create change
Which of the following is a unit of work?
Coulomb
Joule
Newton
Ohm
Which of the following best describes power?
force exerted per unit of time
change of acceleration per unit of time
change of momentum per unit of time
work done per unit of time
Scientists say that "work" is done in the following cases EXCEPT
pushing a door
pulling a schoolbag
lifting a pail of water
carrying a chair across the room
In a marathon, the winner and the runner-up have the same mass. Compared with the runner-up, the winner has more _____________.
energy
force
power
work
What can you conclude about two boys having the same weight and climbing the same height of stairs at different times?
They will do different work but use the same power.
They will do the same work and use different power.
They will do the same work and use the same power.
They will do the same work and have no power.
Which of the following factors would affect the amount of work done?
I. amount of force
II. shape of the object
III. speed of the object
IV. displacement in the direction of the net force
I and II
I and IV
II and III
III and IV
Is there a work done when the force applied is perpendicular to the displacement of the object?
There is work done.
There is no work done.
Is there a work done when the force applied is directed opposite to the displacement of the object?
There is work done.
There is no work done.
Is there a work done by placing a book on your head and walking for a displacement of 3m to the right?
None, because 3m is not enough for a displacement.
Yes, because you've exert enough force to move the object to a distance.
None, because the force applied is perpendicular to the displacement of the book.
Yes, because there is a force applied perpendicular to the displacement of the book.
Is there work done by pushing a wall for three hours?
Yes, because a force is exerted on the wall.
Yes, because you push the wall for three hours.
None, because the wall is too heavy to push.
None, because the wall did not change its position.
A ball with a mass of 2.0 kg is dropped 10 meters from the ground. How much potential energy did it lose?
40 J
80 J
196 J
392 J
A 0.50 kg book dropped from a height of 12.0 meters. How much work was done by the gravity on the book?
58.8 J
4.9 J
96 J
40.8 J
A car with a mass of 1 034 kg moves at a speed of 8.00m/s. What is its kinetic energy?
8 272 J
4 136 J
33 088 J
66 176 J
Maria pushed a pile of books with a force of 78.0 N for a distance of 40.2 m. How much work did Maria do on the books?
3 135.6 J
30 728.88 J
61 457.76 J
6 271.2 J
Carlos did 56.0 Joules of work in 23 seconds. How much power did Carlos show by doing work?
1 288 W
548.8 W
2.43 W
5.71 W
A carpenter pushed a block of wood with a force of 569 N for a distance of 500 meters. If the carpenter finished the work in 60 seconds, how much power did the carpenter show?
28 450 W
1 707 000 W
92.97 W
474.17 W
