Forces

Question 1

What is every measurable quanitity known as?

Answer 1

A Physical Quantity

Question 2

What does a physical quantity consist of?

Answer 2

A magnitude and a unit

Question 3

What is the magnitute and unit for Distance?

Answer 3

Magnitude = 10
Unit = Metres (m)

Question 4

What is the magnitute and unit for Speed(short version also)?

Answer 4

Magnitude = 30
Unit = Metres per second (ms^-1)

Question 5

What is the magnitute and unit for Mass?

Answer 5

Magnitude = 50
Unit = Kilogramme (kg)

Question 6

What is the magnitude and unit for force?

Answer 6

Magnitude = 10
Unit = Newtons (N)

Question 7

What is the magnitude and unit for current?

Answer 7

Magnitude = 5
Unit = Ampere (A)

Question 8

What is the magnitude and unit for temperature(short version also)?

Answer 8

Magnitude = 100
Unit = Kelvin (K)

Question 9

What is the SI Unit of length, mass and time?

Answer 9

Length = Metres(m)
Mass = Kilogramme (kg)
Time = Seconds (s)

Question 10

What is the SI Unit for current and temperature?

Answer 10

Current = Ampere (A)
Temperature = Kelvin (K)

Question 11

What is the SI Unit for amount of substance and luminous intensity?

Answer 11

Amount of substance = Mole (mol)
Luminous intensity = Candela (cd)

Question 12

What are all other physical qauntities derived from?

Answer 12

From the fundamental units

Question 13

What are units useful for?

Answer 13

Checking the homogeneity of physical equations

Homogeneity - the quality or state of being all the same or of all the same kind

Question 14

Give a derived unit

Answer 14

1 joule

Question 15

What is 1 joule equal to?

Answer 15

1kg m² s^-2

Question 16

What makes an equation homogeneous

Answer 16

The units on both sides of the equation matching

Question 17

Check if v² - u² = 2as is homogeneous

V and U = ms^-1
S = m
a = ms^-2

Question 18

What is a prefix used for?

Answer 18

Very large or very small quantities

Question 19

What is the multiple of the base unit of Pico (p) and give an example

Answer 19

10^-12

1pF = 10^-12 F (farad)

Question 20

What is the multiple of the base unit of nano (n) and give an example

Answer 20

10^-9

1nm = 10^-9 m (metre)

Question 21

What is the multiple of the base unit of micro (u) and give an example

Answer 21

10^-6

1um = 10^-6 m (metre)

Question 22

What is the multiple of the base unit of milli (m) and give an example

Answer 22

10^-3

1ms = 10^-3 s (seconds)

Question 23

What is the multiple of the base unit of centi (c) and give an example

Answer 23

10^-2

1cm = 10^-2 m (metre)

Question 24

What is the multiple of the base unit of deci (d) and give an example

Answer 24

10^-1

1dL = 10^-1 L (litre)

Question 25

What is the multiple of the base unit of kilo (k) and give an example

Answer 25

10³

1kg = 10³ g (gram)

Question 26

What is the multiple of the base unit of mega (M) and give an example

Answer 26

10⁶

1 MJ = 10⁶ J (Joule)

Question 27

What is the multiple of the base unit of giga (G) and give an example

Answer 27

10⁹

1GW = 10⁹ W (Watts)

Question 28

What is the multiple of the base unit of tera (T) and give an example

Answer 28

10¹²

1 T Hz = 10¹² Hz (Hertz)