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Application Task - Power

Last updated about 5 years ago

18 questions

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Question 1

1.

Find the power of a washing machine that uses 47470 J in 94 s.

Question 2

2.

Find the power of a fan that uses 15120 J in 280 s.

Question 3

3.

Find the power of a toaster that in 183 s uses 163968 J.

Question 4

4.

Find the power of a kettle that in 241 s uses 417653 J.

Question 5

5.

Find the power of a light bulb that in 197 s uses 12411 J.

Question 6

6.

Find the time taken for a 901 W toaster to use 162180 J of energy.

Question 7

7.

Find the energy used by a 2950 W kettle in 196 s.

Question 8

8.

Find the energy used by a 72 W electric fan which is on for 293 s.

Question 9

9.

Find the energy used by a 64 W light bulb which is on for 69 s.

Question 10

10.

Find the energy used by a 1353 W toaster in 88 s.

Question 11

11.

Find the energy used by a 70 W electric fan which is on for 3 minutes 35 seconds.

Question 12

12.

Find the time taken for a 46 W light bulb to use 6.854 kJ of energy.

Question 13

13.

Find the power of a kettle that uses 293.454 kJ in 153 s.

Question 14

14.

Find the time taken for a 0.067 kW electric fan to use 7.37 kJ of energy.

Question 15

15.

Find the energy used by a 1.393 kW toaster in 180 s.

Question 16

16.

Calculate the power of an electric motor that is able to move a weight of 15N a distance of 20 metres in just 10 seconds

Question 17

17.

Calculate the time taken to by weightlifter to move a 40N weight a distance of 150cm.The power exerted by the weightlifter is 120W

Question 18

18.

Calculate the weight of an iron girder lifted by a crane 0.05km into the air to be placed in a building. To lift the girder it requires a power output of 7430J/s over 2 and a half minutes. Write your answer in kilonewtons