Best Answer

mass = 20 kg

height = 100 m

acceleration due to gravity = 10 m/s2

U = mgh

= 20 X 100 X 10

= 20000 J

or

= 220kJ

More answers

19,600 j "Apex"

The rock's PE is 19,600 joules.

Q: What is the potential energy of a 20 kg rock placed at the top of a cliff with a height of 100 meters?

Write your answer...

Submit

Still have questions?

Continue Learning about Physics

.potential energy equalls mgh, where m is mass of object, g is gravity, h is height of the object placed from the ground level. . When height increases potential energy also increases..

Use the formula PE = mgh (potential energy = mass x gravity x height). Gravity is approximately 9.8 m/s2. Answer will be in Joule.

If the object is placed at height, it has potential energy and when this object falls down, this potential energy is converted to kinetic (kinesis means movement) energy. If we have to lift object at height , we have to spend energy, witch is released during fall of the object. Example is when water comes down in hydroelectric power station potential energy is converted into kinetic energy. Witch is used to rotate wheel, creating electricity.

Potential energy is pretty much the potential for kinetic energy. The less kinetic energy there is, the more potential... On the other hand, if you need gravitational potential energy, then the higher the object is placed above the ground, the more GPE it has.

As soon as the object is allowed to move, potential energy starts getting transformed into kinetic energy. For example the object placed on height. As soon as it is allowed to fall, the potential energy starts getting converted into kinetic energy. It is maximum at the time the object touches the ground.

Related questions

.potential energy equalls mgh, where m is mass of object, g is gravity, h is height of the object placed from the ground level. . When height increases potential energy also increases..

Use the formula PE = mgh (potential energy = mass x gravity x height). Gravity is approximately 9.8 m/s2. Answer will be in Joule.

Use the formula PE = mgh (potential energy = mass x gravity x height). Gravity is approximately 9.8 m/s2. Answer will be in Joule.

a body of mass 50kg is placed on a wall of height 1.5m above the ground.calculate the potential energy of the body(g_10mls2)

If the object is placed at height, it has potential energy and when this object falls down, this potential energy is converted to kinetic (kinesis means movement) energy. If we have to lift object at height , we have to spend energy, witch is released during fall of the object. Example is when water comes down in hydroelectric power station potential energy is converted into kinetic energy. Witch is used to rotate wheel, creating electricity.

Potential energy is pretty much the potential for kinetic energy. The less kinetic energy there is, the more potential... On the other hand, if you need gravitational potential energy, then the higher the object is placed above the ground, the more GPE it has.

As soon as the object is allowed to move, potential energy starts getting transformed into kinetic energy. For example the object placed on height. As soon as it is allowed to fall, the potential energy starts getting converted into kinetic energy. It is maximum at the time the object touches the ground.

When an object is placed obove the ground !is at rest !

Gravitational potential energy (GPE)

A roller coaster on the top of the ride Book on top of bookshelf Apple on top of table

A little complicated, but here are two examples: In electric fields, a potential of 5 Volts means that if a 1 coulomb charge were placed there, it would have a potential energy of 5 Joules. In gravitational field, a potential of 5 J/kg means that if a 1 kilogram mass were placed there, it would have a potential energy of 5 Joules.