Question

How much potential energy does a 20-kg barrel have when it is in the truck whose floor is 5.0 m above the ground? P.E. = J

Answer 1

Answer:

Potential energy, PE = 980 J

Explanation:

It is given that :

Mass of the barrel, m = 20 kg

Height above the ground surface, h = 5 m

We have to find the potential energy of the barrel. Potential energy is given by the product of mass of an object, acceleration due to gravity and height above the ground surface.

Mathematically, the expression for potential energy is given by :

PE=mgh

$PE=20\ kg\times 9.8\ m/s^2\times 5\ m$

PE= 980 Joules

Hence, this is the required solution.

Answer 2

The answer is 980 J.