P5 - Contact And Non-Contact Forces

Question 1

What is a vector quanitity?

Answer 1

A quanity that has both magnitude and direction

Question 2

What is a scalar quantity?

Answer 2

A quantity that has only magnitude and NO direction

Question 3

State examples of a vector quanitity

Answer 3

• Force
• Velocity
• Displacement
• Acceleration
• Momentum

Question 4

State examples of scalar quanitites

Answer 4

• Speed
• Distance
• Mass
• Temperature
• Time

Question 5

How are vectors usually represented?

Answer 5

By an arrow - the length of the arrow shows the magnitude,and the direction of the arrow shows the direction of the quantity

Question 6

What is a contact force?

Answer 6

When two objects touch each other in order for a force to act,it is a contact force

Question 7

What is a non-contact force?

Answer 7

If the objects do not need to be touching for a force to act,it is a non-contact force

Question 8

State examples of contact forces

Answer 8

• Friction
• Air resistance
• Tension
• Normal contact force

Question 9

State examples of a non-contact force

Answer 9

• Magnetic force
• Gravitational force
• Electrostatic force

Question 10

What is an interaction pair?

Answer 10

A pair of forces that are equal and opposite and act on two interacting objects

(This is basically newtons third law)

Question 11

A tennis ball is dropped from a height.Name one contact and one non-contact force

Answer 11

Contact force - Air resistance
Non-contact force - Gravitational force

(The air resistance is going up whilst the gravitational force is going down)