Selina solutions

Selina solutions

Selina solutions

Grade 8

CHAPTERS

Q11) A pump raises water by spending 4\times10^5\ J of energy in 10 s. Find the power of pump.

Solution:

Energy spent = W = 4\times10^5\ J

Time taken = 10 s

Power = Energy / Time

P = \frac{4\times10^5}{10}

= 4\times10^4\ W

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Book a free class nowQ11) A pump raises water by spending 4\times10^5\ J of energy in 10 s. Find the power of pump.

Solution:

Energy spent = W = 4\times10^5\ J

Time taken = 10 s

Power = Energy / Time

P = \frac{4\times10^5}{10}

= 4\times10^4\ W

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