Question

Question 26
How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 100 W, be able to lift at constant speed of $1m{s}^{-1}$ vertically? $(g=10m{s}^{-2})$

Answer 1

$Power=\frac{W}{T}$
=$\frac{mgh}{t}$
=$mg\left(\frac{h}{t}\right)$

Here $\frac{h}{t}=speed$

Therefore, $m=\frac{power}{g\times speed}=\frac{100}{10\times 1}=10kg$