Question

. An engine develops 10 kW of power. How much time will it take to lift the mass of 200 kg to a height of 40 m. (Take g = 10 m s⁻¹ ) *

2 points

(a) 4 s

(b) 6 s

(c) 8 s

(d) 10 s​

Answer 1

Power=(m∗g∗h)/t

t=m∗g∗h/power=(200∗40∗10)/10∗10

3

=8s

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