A boy weighing 42 kg eats bananas whose energy is 980 calories. If this energy is used to go to height h fing the value of h.

A boy weighing 42 kg eats bananas whose energy is 980 calories. If thi

1.	A boy weighing 42 kg eats bananas whose energy is 980 calories. If this energy is used to go to height h fing the value of h.
Answer» SOLUTION :Energy gained by the boy in EATING bananas = `980 "calorie" = 980 xx 4.2 J` . If m is the mass of the boy, the potential energy gained by the boy in going up through a height h is mgh. In SI, energy = potential energy `980 xx4.2 = "mgh" , 980 xx 4.2 = 42 xx9.8 xx h` ` h= (980xx4.2)/(42xx9.8) = 10m`