Question

A 5 kg rock is on top of a 50-meter-high hill. What is the gravitational potential energy of the rock?
a. 250 J b. 2,450 J c. 245 J d. 12,500 J

Answer 1

Given:-

• Mass of Rock = 5kg

• Acceleration due to gravity = + 10m/s²

• Distance Covered = 50m

To Find:-

• G. P. E → Gravitational Potential Energy.

Formulae used:-

• Potential Energy = mgh

Now,

→ Potential energy = mgh.

→ P. E = 5 × 9.8 × 50

→ P. E = 2450J

The Gravitation Potential energy is 2450J. Hence, Option "B" is Correct.

MORE TO KNOW :-

• Work Done is defined as when there is any force acting on object which displaces in the direction of motion.

• Potential energy is defined as the energy Possessed by the Virtue of its Position.

• Kinetic energy is defined as the energy Possessed by moving body.

• It's equation is given as K. E = mv²/2.

Answer 2

$\huge{\underbrace{\mathbb{ANSWER}}}$

Mass (m) = 5 kg

Height (h) = 50 m

Gravitational force (g) = 9.7m/s

$\star \: \boxed {\rm{ Potential ~energy(PE) = mgh}}$

$\rm PE = 5 \times 9.8 \times 50$

$\rm PE = 2450 \: J$

$\therefore~\sf{\underline{\underline{Potential ~Energy = ~(b) ~2450~J}}}$