Question

How many kg will a man working at the power of 100 watt be able to lift at constant speed of 1m/s vertically? g=10m/s2. Plzzz someone answer me immediately!!!!!!!

Answer 1

given P=100W    v=1m/s      m=?    g=10m/s^2
 the formula to be used is P=F*V
   P=mgV   or m=P/V*g

    m=100/10*1
    m=10Kg        So the man can lift a mass of 10Kg.


(P=mgh/t     but mg=F  and h/t= V so power can be written as P= F*V)

Answer 2

The mass of man is 10 kg.

Explanation:

The power of a man, P = 100 watts

Speed of a man, v = 1 m/s (vertically)

Acceleration due to gravity, $g=10\ m/s^2$

The power of any object is given by :

$P=F\times v\\\\P=mgv\\\\m=\dfrac{P}{gv}\\\\m=\dfrac{100\ W}{10\times 1}\\\\m=10\ kg$

So, the mass of man is 10 kg.

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