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WorksheetsPower
Total questions: 23
Worksheet time: 27mins
A 30 W device was used for 16.667 seconds. How much work was done in this time?
(a)
A 90 W device was used for 20 seconds. How much work was done in this time?
(a)
A 56 W device was used for 4 seconds. How much work was done in this time?
(a)
A 15 W device was used for 20 seconds. How much work was done in this time?
(a)
A 40 W device was used for 41.25 seconds. How much work was done in this time?
(a)
A device does 500 J of work in 16.667 seconds. Calculate the power of this device.
(a)
A device does 1800 J of work in 20 seconds. Calculate the power of this device.
(a)
A device does 224 J of work in 4 seconds. Calculate the power of this device.
(a)
A device does 300 J of work in 20 seconds. Calculate the power of this device.
(a)
A device does 1.65 kJ of work in 41.25 seconds. Calculate the power of this device.
(a)
A 30 W device does 500 J of work. How long was the device operating?
Give your answer to 3 significant figures.
(a)
A 90 W device does 1800 J of work. How long was the device operating?
(a)
A 56 W device does 224 J of work. How long was the device operating?
(a)
A 15 W device does 300 J of work. How long was the device operating?
(a)
A 40 W device does 1650 J of work. How long was the device operating?
Give your answer to 2 significant figures.
(a)
A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has she done?
600 J
450 J
900 J
1200 J
You move a 8 N object five meters in 4 seconds. How much power have you generated?
160 watts
10 watts
6.4 watts
17 watts
50 J of work is done lifting a 20.0 N book in the air. How high was it lifted?
2.5 m
3.5 m
0.4 m
25 m
Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?
100 watts
400 watts
104 watts
50 watts
A cannon shoots a 1000 N stunt performer 100 m. How much work is done on the performer?
100,000 J
10,000 J
10 J
1,000,000 J
