Work Energy and Power - Result Question 36
39. One coolie takes 1 minute to raise a suitcase through a height of $2 m$ but the second coolie takes $30 s$ to raise the same suitcase to the same height. The powers of two coolies are in the ratio of
[NEET Kar. 2013]
(a) $1: 2$
(b) $1: 3$
(c) $2: 1$
(d) $3: 1$
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Answer:
Correct Answer: 39. (a)
Solution:
- (a) $\because$ Power $P=\frac{W}{t}$
$\Rightarrow \frac{P_1}{P_2}=\frac{t_2}{t_1}=\frac{30 s}{1 \text{ minute }}=\frac{30 s}{60 s}=\frac{1}{2}$
( $t_1=1$ minute; $t_2=30$ second given)
