Forces and their effects booklet

Question 1

Define a scalar

Answer 1

A quantity with magnitude

Question 2

Define a vector

Answer 2

A quantity with magnitude and direction

Question 3

Name three scalars

Answer 3

Mass

Density

Speed

Question 4

Name three vectors

Answer 4

Force

velocity

acceleration

Question 5

Name the two types of forces

Answer 5

Contact and non - contact

Question 6

Name a contact force

Answer 6

Friction

Question 7

Name a non contact force

Answer 7

Weight

Question 8

What is the equation for weight ?

Answer 8

weight = Mass x gravity

w = m x g

Question 9

Define a resultant force

Answer 9

More than one force actss on the body

Question 10

What is the equation for spring constant ?

Answer 10

Spring constant = Force / extension

K = F / E

Question 11

What is Newtons first law ?

Answer 11

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

Question 12

What Is Newtons 2nd law ?

Answer 12

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

Question 13

Define acceleration

Answer 13

The measurement of how much an objects speed has changed

Question 14

Equation for acceleration ?

Answer 14

Acceleration = Change in speed / time taken

A = triangle v / t

Question 15

What is newtons 3rd law ?

Answer 15

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

Question 16

Define momentum

Answer 16

A measure of how difficult it would be to stop something

Question 17

What does momentum depend on ?

Answer 17

Mass and velocity

Question 18

What is the equation for Momentum ?

Answer 18

Momentum = Mass x velocity

P = M x V

Question 19

Equation for force ?

Answer 19

Change in momentum / Time

Triangle P / t