Physics Formulas and Units

Question 1

SI unit of Force and its measure

Answer 1

SI Unit: N (Newton)

F=MV
Where, F =Force |M = Mass of the Object | V = Velocity

Question 2

SI unit of Moment and its measure

Answer 2

SI Unit: Nm (Newton-Meter) (TORQUE)

Moment (T) = Force (F) x Distance (d)
Where, T = Tau or the Moment or Torque | F = Force | d = Distance

Question 3

SI Unit of Momentum and its measure

Answer 3

SI Unit: Kg.m/s (Kilogram.Meter per second)

Momentum (p) = Mass (m) x Velocity (v)
Where, p = Momentum | m = Mass of the object | v = Velocity the object is traveling

Question 3

SI unit of Work and its measure

Answer 3

SI Unit: J (Joule)

Work (W) = Force (F) x Distance (d) x Cos (0)
Where, W = Work in Joules | F = Force over the Object | d = Distance over which the force is applied | Cos (0) = Cos Theta at an angle

Question 4

SI unit of Energy and its measure

Answer 4

SI Unit: J (Joule)

Kinetic Energy (K.E)
KE = 1/2 mv^2
Where, KE = Kinetic Energy |m = Mass of the object | v = Velocity of the object

Potential Energy (P.E)
PE = mgh
Where, PE = Potential Energy | m = Mass of the object | g = Acceleration due to gravity | h = Height

Question 5

SI unit of Power and its measure

Answer 5

SI Unit: W (Watt)

Power (P) = W (Work) / T (Time)
Where, P = Power | W = Work Done | T = Time

Question 6

SI unit of Speed and its measure

Answer 6

SI Unit: m/s or Km/s (Meters per second or Kilometres per Second)

Speed (S) = Distance (d) / Time (t)
Where, S = Speed of the object | d = Distance | t = Time

Question 7

SI unit of Current and its measure

Answer 7

SI Unit: Ampere

Question 7

SI unit of Velocity and its measure

Answer 7

SI Unit: m/s (Meter per Second)

Velocity (v) = Displacement (d) / Time (t)
Where, v = Velocity of the object | d = Displacement | t = Time

Question 8

SI unit of Displacement and its measure

Answer 8

SI Unit: Km or m (Kilometers or Meters)

Question 9

SI unit of Distance and its measure

Answer 9

SI Unit: Km or m (Kilometers or Meters)

Question 10

SI unit of Acceleration and its measure

Answer 10

SI Unit: m/s^2 (Meters per second Squared)

Acceleration (a) = v (Change in Velocity) / t (Change in Time)

Question 11

SI unit of Potential Difference and its measure

Answer 11

SI Unit: Volts

Question 12

SI unit of Capacitance and its measure

Answer 12

SI Unit: Farrad

Question 13

Give the 5 formulas for Equations of Motion

Answer 13

1. v = u + at
2. s = ut + 1/2 at^2 (Half AT Squared)
3. v^2= u^2 + 2as
4. s = u + a/2 (2a-1)
5. s = (u+a)/2 x t

Question 14

SI unit of Resistance

Answer 14

SI Unit: Ohms

Question 15

SI unit of Density and its measure

Answer 15

SI Unit: Kg/m^3 (Kilogram per meter cube)

p = m / v
Where, p = Density | m = Mass | v = Velocity

Question 16

SI unit of Magnitism

Answer 16

SI Unit of magnetic Field: Tesla
SI Unit of Magnetic Flux: Weber

Question 17

Give the 3 formulas for Free Fall

Answer 17

1. v = u + at
2. h = ut + 1/2 at^2 (Half AT Squared)
3. v^2= u^2 + 2as

Question 18

The equation to find the nth second in motion.

Answer 18

h = u + a/2 (2n-1)

Where, h = height of the object | a = Acceleration due to gravity | n - the Nth second

Question 19

1 Joule equals?

Answer 19

1 Nm of torque or moment

Question 20

Volume is best given by ___________
a) Product of mass and density
b) Ratio of mass to density
c) Addition of mass and density
d) Subtraction of mass and density

Answer 20

b) Ratio of mass to density