Chapter 1: Physical Quantities, Units & Measurements

Question 1

What is a physical quantity?

Answer 1

A physical quantity is a quantity that can be measured. It consists of a numerical magnitude and a unit

Question 2

What is an oscillation?

Answer 2

Each complete to-and-fro motion is one oscillation

Question 3

What is a period?

Answer 3

The period of a simple pendulum is the time taken for one complete oscillation

Question 4

What is a scalar quantity?

Answer 4

Scalar quantities are physical quantities that have only magnitude

Question 5

What is a vector quantity?

Answer 5

Vector quantities are physical that have only magnitude and direction

Question 6

What are the 5 vector quantities?

Answer 6

displacement, s (m)
velocity, v (m/s) [displacement/time]
acceleration, a (m/s ^2) [velocity/time]
force, F (N)
weight, w (N)

Question 7

What is the formula for Speed?

Answer 7

Speed = Distance / Time Taken

Question 8

What is the formula for Velocity?

Answer 8

Velocity = Displacement / Time Taken

Question 9

What are the 5 vector quantities?

Answer 9

displacement, s (m)
velocity, v (ms-1)
acceleration, a (ms-2)
force, F (N)
weight, w (N)