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Flashcards in Forces and their effects booklet Deck (19)
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1

Define a scalar

A quantity with magnitude

2

Define a vector

A quantity with magnitude and direction

3

Name three scalars

Mass

Density

Speed

4

Name three vectors

Force

velocity

acceleration

5

Name the two types of forces

Contact and non - contact

6

Name a contact force

Friction

7

Name a non contact force

Weight

8

What is the equation for weight ?

weight = Mass x gravity

w = m x g

9

Define a resultant force

More than one force actss on the body

10

What is the equation for spring constant ?

Spring constant = Force / extension

K = F / E

11

What is Newtons first law ?

If all forces an object are balanced then the object will be stationary or move at a constant speed

12

What Is Newtons 2nd law ?

If a resultant force is present. An object will accelerate in the direction of that resultant force

13

Define acceleration

The measurement of how much an objects speed has changed

14

Equation for acceleration ?

Acceleration = Change in speed / time taken

A = triangle v / t

15

What is newtons 3rd law ?

That for every force there is a equal but opposite force.

16

Define momentum

A measure of how difficult it would be to stop something

17

What does momentum depend on ?

Mass and velocity

18

What is the equation for Momentum ?

Momentum = Mass x velocity

P = M x V

19

Equation for force ?

Change in momentum / Time

Triangle P / t