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mass = 20 kg

height = 100 m

acceleration due to gravity = 10 m/s2

U = mgh

= 20 X 100 X 10

= 20000 J

or

= 220kJ

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13y ago
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8y ago

19,600 j "Apex"

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9y ago

The rock's PE is 19,600 joules.

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

How does height affect the amount of potential energy of an object?

.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..


How much energy (in joules) does a 3-kg vase possess when its placed on a shelf 2.5 meters above the ground?

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


What is difference between potential and kinetic energy give two examples?

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.


How can potential energy be increased and decreased?

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.


When is potential energy transformed into kinetic energy?

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

How does height affect the amount of potential energy of an object?

.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..


How much energy in joules does a 3 kg vase possess when its placed on a shelf 2.5 meters above the ground?

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


How much energy (in joules) does a 3-kg vase possess when its placed on a shelf 2.5 meters above the ground?

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How much energy in Joules does a 3 kg vase possess when it's placed on a shelf 2.5 meters above the ground?

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


What is difference between potential and kinetic energy give two examples?

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.


How can potential energy be increased and decreased?

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When is potential energy transformed into kinetic energy?

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