Lesson 6: Force and Work

Question 1

Force

Answer 1

A push or pull on an object

Question 2

Is force a vector and scaler quantity?

Answer 2

• Vector quality

Question 3

What is force measured in?

Answer 3

• Newtons (N)

Question 4

What are Newtons Laws?

Answer 4

1. An object in motion will continue to be in motion unless acted upon by a force. An object in rest will continue to be in rest unless acted upon by a force
2. A larger force will result in a larger acceleration

Question 5

Balanced Force

Answer 5

• The force in one direction is the same as the other direction
• Forces are cancelled out by each other
• No net force or change in velocity

Question 6

Unbalanced Force

Answer 6

• The force in one direction is larger than the force in the opposite direction
• Will cause change in acceleration (object may speed up or slow down)

Question 7

Weight

Answer 7

• Force due to gravity
• Not the same as mass

Question 8

Weight Formula

Answer 8

• Fg = Mg (add arrows to F and second g)

Fg = weight/force of gravity
- measured in Newtons (N)
M = mass
- measured in kg
g = acceleration due to gravity
- measured in m/s squared

Question 9

Work

Answer 9

• A measure of the amount of energy transferred from one object to another when a force is exerted

Question 10

What is work measured in?

Answer 10

• Jules (J)

Question 11

Work Formula

Answer 11

W = Fd

W = work
- measured in Jules (J)
F = force
- measured in Newtons (N)
d = distance
- measured in meters (m)

Question 12

What three conditions must be met for work to be done to an object?

Answer 12

1. There must be a force
2. There must be a movement
3. The force and the distance the object travels must be in the same direction

Question 13

What other formula can be used to find work?

Answer 13

• Change in energy
  (Triangle)Energy = Work