Derived quantities

Question 1

Let’s start easy what is the derived quantity for the area in a square?

Answer 1

Length x Length= M x M (in S.I units) = metre squared

Question 2

What is the derived quantity of Density?

Answer 2

Density= mass ÷ volume= kg÷m= kg/m^-3

Question 3

What is the derived quantity of acceleration?

Answer 3

acceleration= velocity ÷ time

ms^-1 ÷ s= ms^-2

Question 4

What is the derived quantity of velocity?

Answer 4

Velocity= displacement ÷ time

m ÷ s= m/s^-1

Question 5

What is the derived quantity of Force?

Answer 5

unit of Mass x unit of Acceleration
kg x ms^-2= kgms^-2
Newton (N)

Question 6

The derived quantity of force forms another derived unit what is it?

Answer 6

Newton (N)

Question 7

What is the derived quantity of Kinetic Energy?

Answer 7

½ (mass) x (velocity)2
(the constant is ignored)
Unit of Mass x Unit of velocity to the power of 2
kg   (ms^-1) squared
kgm(^2)s(^-2)
This is also known as  Joule (J)

Question 8

What is the derived quantity of Potential Energy?

Answer 8

(mass) x (acceleration due to gravity) x (height)
kg x ms^-2 x m
kgm(^2) s (^-2)

Question 9

What is the derived quantity of Power?

Answer 9

Energy changed ÷ time taken
Unit of Energy ÷ Unit of Time
kgm(^2)s(^-2) ÷ s= kgm^2s^-3
Which also equals to a Watt (W)

Question 10

What is the derived quantity of Speed?

Answer 10

(l) ÷ (t)

m ÷ s= Unit of speed = ms^-1

Question 11

The derived quantity for Kinetic energy is Watt true or false

Answer 11

False, its Joule (J) ya numskull

Question 12

The derived quantity for Power is Watt true or false?

Answer 12

True it is Watt (W)