Unit 2 - Forces

Question 0

List different types of force

Answer 0

Friction
Air resistance
Weight
Upthrust

Question 1

What is a force?

Answer 1

A force is a push or a pull acting on an object

Question 2

What is force measured in?

Answer 2

Newtons, N

Question 3

Who came up with the 3 Laws of motion?

Answer 3

Sir Isaac Newton

Question 4

What is Resultant Force?

Answer 4

Resultant force is when more than one force is acting upon an object

Question 5

What are the rules for working out same/opposite directions?

Answer 5

Same direction ➡️ ADD

Opposite direction ➡️ SUBTRACT

Question 6

What is Newton’s First Law?

Answer 6

A body will remain at REST or CONTINUE to move at a CONSTANT VELOCITY unless acted upon by an EXTERNAL (resultant) force

Question 7

What is inertia?

1st law

Answer 7

The resistance of any object to any change in its motion

Question 8

Example of Inertia?

Answer 8

A cruise ship, it’s very difficult to move, accelerate, decelerate, change it’s direction etc. (because of its inertia)

Question 9

What is Momentum?

Answer 9

How much an motion an object has

Question 10

How to calculate Momentum?

Answer 10

Momentum = mass ✖️ velocity

Question 11

Units for:

Momentum = Mass x Velocity

Answer 11

P = M ✖️ V

Question 12

What is Newton’s second law?

Answer 12

The rate of change of momentum is proportional to the (resultant) force applied, it takes place in the direction of the (resultant) force

Question 13

How to calculate change in Momentum?

2nd law

Answer 13

Force = change in momentum ➗ time

Question 14

What are the change in Momentum equation units?

Answer 14

F =

Question 15

Units for:
Force
Time
Change in momentum

Answer 15

Force: Newtons, N
Time : Seconds, S
Change in momentum: kg m/s

Question 16

What is Mass?

Answer 16

A measure of how much MATTER or material an object has

Measured in kg

Question 17

What is Weight?

Answer 17

Measure of how large the force of gravity is on an object

Measured in Newtons, N