Topic 5- Forces And Their Interactions

Question 1

What is the difference between a vector and scalar quantity?

Answer 1

Scalar has magnitude but not direction.

Vector is a quinaity that has both magnitude and direction

Question 2

How can a vector be drawn and what does it show?

Answer 2

As an arrow
The length of arrow represents magnitude
Points in associated direction

Question 3

What is a force?

Answer 3

Push or pull acting on an object due to an interaction with another object

Question 4

What are 2 categories of forces?

Answer 4

Non contact force

Contact force

Question 5

Give 3 examples of contact forces

Answer 5

1. Friction
2. Air resistance
3. Tension

Question 6

Give 3 examples of non contact forces?

Answer 6

1. Gravitational
2. Electrostatic
3. Magnetic

Question 7

Is force vector or scalar?

Answer 7

Vector as it has both magnitude and direction

Question 8

Give 3 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

What is weight?

Answer 10

Force acting on an object due to gravity and the object’s mass

Question 11

What is the unit for weight?

Answer 11

The newton (N)

Question 12

What is the unit for gravitational field strength?

Answer 12

N/Kg

Question 13

What is an objects centre of mass?

Answer 13

The single point where object’s weight can be considered to act through

Question 14

What equipment is used to measure an object’s weight?

Answer 14

A calibrated spring-balance or newton meter

Question 15

What is the name given to the single force equivalent to all forces acting on the object?

Answer 15

The resultant force