Free Printable (B1) 15/4 WORK , ENERGY AND POWER .

Worksheets

Name

Class

Date

1. If F= 2N , velocity , = 5 m/s , then power is _________ .

a. 2 x 5

b. 2 ÷ 5

c. 2 + 5

d. 2 - 5

2. If work = 50 joule , t = 5 sec , then power is _______ .

a. 10 watt

b. 5 watt

c. 250 watt

d. None .

3. Energy because of velocity is called as ______ .

a. K.E

b. Potential Energy

c. Heat Energy

d. Power

4. Ratio of output power to input power is called as _____ .

a. Effeciency

b. Total power

c. Useful Power

d. Energy

5. Input Power : 10 Joule output power = 8 Joule . Effeciency _________

a. 80 %

b. 110%

c. 20 %

d. 60 %

100 %

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