Module 1

Front 1

Centre of Gravity:
- A point where the entire weight of the object can be considered to act as a single force.

Back 1

Finding the centre of gravity-Experiment:
- Support the piece freely on a wire passed through a small hole.
- From the wire hang a plumb line to show the vertical.
- Mark the line of the string as the centre of gravity- must lie along it.
- Repeat- from a different hole.
- Centre of gravity is where the two marked lines intersect.
- Check by balancing the piece on the point of a pencil.

Front 2

SI Units:
1. Mass - kilogram - kg
2. Length - metre -m
3. Time - second - s
4. Temperature - Kelvin- K
5. Electrical current - ampere - A
6. Amount of substance - mole - mol

Back 2

SI Prefixes ^

Front 3

Scalar quantities:
[Magnitude only]
- density
- temperature
- pressure
- potential difference
- frequency
- wavelength
- power

Back 3

Vector quantities:
[Magnitude and Direction]
- displacement
- velocity
- acceleration
- force
- impulse
- momentum
- electrical current
- magnetic field
- electric field

Front 4

Kinematics- Definitions:
-Speed: distance per unit time [scalar]
- Displacement: distance moved in a stated direction
- Velocity: displacement per unit time [vector]
- Instantaneous speed: the speed at a given instant of time- gradient.
- Acceleration: rate of change of velocity

Back 4

Equations of Motions:
v=u+at
s=1/2(u+v)xt
s=ut+1/2at2
s=vt-1/2at2
v2=u2+2as