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