Lesson 1: Contact/ Non- contact forces

Question 1

Finish the sentence…

A contact force between two objects is when….

Answer 1

• the objects are physically touching.

Question 2

Finish the sentence

A non- contact force between two objects is when…

Answer 2

• The objects aren’t touching.

Question 3

Give examples of 4 contact forces.

Answer 3

1.) Friction
2. Air resistance
3. ) Tension
4.) Normal contact force (reaction force ie lamp on table’s upward force, this force is only exerted when the lamp and the table are touching.)

Question 4

Give 3 examples of non- contact forces.

Answer 4

1.) Gravitational force
2.) Electrostatic force
3.) Magnetic force

Question 5

Are forces a vector or scalar quantity?

Answer 5

Forces are a vector quantity.

Question 6

What is a scalar quantity?

Answer 6

• Scalar quantites have magnitude only.

Question 7

What is a vector quantity?

Answer 7

• Vector quantities have magnitude and direction.

Question 8

What a force?

Answer 8

• A force is a push or pull on an object due to the interraction with another object.