Physics grade11

• Science
• Secondary Education

Gravitational potential energy 

Grade-11

Physics

May 17, 2020

egame- 3 minutes 

Objectives 

1. describe the work done by gravity as objects rises high

2.Analyse various situations with reference to reference level

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From the video 

Gravitaional potential energy - the stored energy due to gravity 

Reference level- Th height to which the object has risen is determined by using refernece level, where GPE is zero.

GPE = mgh 

The equation GPE = mgh represents

1. elastic potential energy
2. gravitational potential energy
3. potential energy
4. rotational potential energy

The height to which an object has risen is determined by using a reference level, the position where PE is defined to be _____.

1. 0
2. 1
3. 2
4. 3

A 25.0 kg shell is shot from a cannon at Earth's surface.the reference level is Earths' surface. What is the shell-Earth system gravitational potential energy when the shell's height is 425m ? {HINT GPE=mgh}

1. 425 J
2. 1000 j
3. 1.0 *10^5 J
4. 25.0 j

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