Question

A girl weighing 42 Kg eats banana whose energy is 980 calories. If this energy is used go to height h. Find the value of h. (1 cal = 4.2J )

Answer 1

Given,

Mass of girl, $M=42kg$

Girl eat 1 bananas

$1cal=4.18J$

Energy in 1 bananas =$980cal=980\times 4.18=4096.4J$

Potential energy = Energy in bananas

$mgH=4096.4J$

$H=\frac{4096.4}{mg}=\frac{4096.4}{42\times 9.8}=9.85m$

To the height of $9.95m$