# Work

In: Science

Submitted By felixpogi
Words 781
Pages 4
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 = 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.

1. Power is defined as the _______ is done. a. amount of work which c. direction at which work
b. angle at which work d. the rate at which work

2. Which of the following statements is NOT correct a) energy is the capacity to do work c) Work can be express as Force x Distance
b) the unit of power is the joule d) power is the amount of work done in a unit of time

3. Xena can carry a 10 kg load up to a 3 meters stair in 30 seconds while Nygel can carry the SAME load on the same stair in 10 seconds. How can you compare the power of Nygel to that of Xena? a. Xena is more powerful than Nygel in lifting the load b. Nygel is more powerful than Xena in lifting the load c. Xena and Nygel have the same power

4. A bulldozer does work at a rate of 12 000 000 N every 60 seconds. How powerful is it? a. 200 000...

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