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# Work Essay

781 words - 4 pages

WORKSHEET 3
WORK AND POWER
Key Concepts:
WORK (W) – is the PRODUCT of the net FORCE (F) applied and the DISTANCE (d) it travels in the direction of
Force. In equation WORK = force x distance , (W = Fd)
POWER (P) – is the RATE (t) of the doing WORK (W). The FASTER the WORK is done, the GREATER the POWER.
In equation:
Power (P) = WORK (W) / time (t)
* Amount of power does not show the amount of work done. It just gives the time that work requires.

WATTS - unit for power. 1 watt – 1 J/s.

Key Concepts:
WORK (W) – is the PRODUCT of the net FORCE (F) applied and the DISTANCE (d) it travels in the direction of
Force. In equation WORK = ...view middle of the document...

20 000 J/s c. 720 000 000 N.s d. 72 000 000 N.s

5-6. Consider the figure

2 m
2 m

20 N
20 N

5. Neglecting friction, how much work is done in pulling the crate to a distance of 2 meters?
a. 10 N.m b. 40 N.m c. 0.1 N.m d. 5 N.m

6. If the time it takes to raise the crate to a distance of 2 meter is 20 seconds, how much is the power?
a. 0.5 Watts b. 2 watts c. 0.005 Watts d. 0.25 Watts

FORCE vs DISTANCE GRAPH
60
60
| | | | A
A
| |
50
50
| | | | B
B
| |
40
40
| | | | C
C
| |
30
30
| | | | | |
20
20
| | | | D
D
| |
| | | | | |
| | | | | |
FORCE (N)
FORCE (N)
7-8 Refer to the graph.

7. Based from the graph, which person has the
greatest amount work done?
a. A b B c. C d. D
8. Who among the four is the most powerful if
all them did the work with an equal amount
of time?
a. A b B c. C d. D

7-8 Refer to the graph.

7. Based from the graph, which person has the
greatest amount work done?
a. A b B c. C d. D
8. Who among the four is the most powerful if
all them did the work with an equal amount
of...

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