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Flashcards in Potential & Kinetic Energy Deck (16):
1

What is meant by Kinetic energy?

Kinetic energy is the energy something has when it is moving

2

What is the equation for gravitational potential energy?

Gravitational = mass X g X height
Potential energy

3

What is gravitational potential energy measured in?

Joules (Ep)

4

On earth what is our gravitational field strength?

10 N/kg

5

What is the equation for kinetic energy?

Kinetic = 1/2 X mass X speed(2)
Energy

6

When something falls what is it's potential energy converted into?

When something falls its potential energy is converted into kinetic energy

7

How do you space shuttles cope with the heat former by kinetic energy when entering the atmosphere?

Space shuttles have heat Shields made from special materials which lose heat quickly, allowing the shuttle to re-enter the atmosphere without burning up

8

How do most to meet yours not hit the earth?

Temperatures become so extreme that most meteors burn up completely before reaching the earth

9

What causes work to be done in the atmosphere?

Friction due to collisions with particles in the atmosphere transfers some of their kinetic energy to heat energy and work is done

10

When an elastic object is stretched what is this energy stored as?

Elastic potential energy

11

The extension of an elastic object is directly proportional to....?

The extension of an elastic object is directly proportional to force

12

What is equation for elastic potential energy?

K= Spring constant
F= force
e= extension

F=k X e

13

What is gravitational potential energy?

The energy an object has due to its vertical position in the gravitational field

14

Why don't many meteors hit the earth?

Friction as they enter the atmosphere transfers some of their kinetic energy to heat, The temperature gets so extreme that most Burn up

15

What is the limit of proportionality(

The maximum force that an object can take and still extend proportionally

16

What is gravitational potential energy?

Gravitational potential energy is the energy and object has because of its height