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:

  1. (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)