Topic 9 – Forces and their Effects- Types of Forces

Question 1

What is a force?

Answer 1

a push or pull acting on an object due to an interaction with another object.

Question 2

what are the two categories that all forces can be split into?

Answer 2

1. Contact forces (objects touching)

2. Non-contact forces (objects separated)

Question 3

Give three examples of contact forces.

Answer 3

1. Friction
2. Air resistance
3. Tension

Question 4

give three examples of non-contact forces.

Answer 4

1. Gravitational forces 2. Electrostatic forces 3. Magnetic forces

Question 5

Is force a vector or a scalar quantity? Why?

Answer 5

● Vector

● It has both magnitude and direction

Question 6

What is a scalar quantity?

Answer 6

● A quantity that only has a magnitude
● A quantity that isn’t direction
dependent

Question 7

What is a vector quantity?

Answer 7

A quantity that has both magnitude and direction.

Question 8

Give three examples of vector quantities

Answer 8

1. Velocity
2. Displacement
3. Force

Question 9

Give examples of scalar quantities.

Answer 9

● Temperature 
● Time
● Mass
● Speed
● Distance 
● Energy

Question 10

How are vectors represented? (Higher)

Answer 10

● Vector arrows
● Length indicates magnitude
● Arrow indicates direction

Question 11

How can you calculate the resultant magnitude and direction of forces using a scale drawing?

Answer 11

● Draw the component forces as scaled arrows, joined tip-to-tail
● Draw a line connecting the two open ends.
● Measure the length of this line and convert into the magnitude.
● Measure the angle between the resultant line and the
vertical/horizontal to find the direction.