# Shared Flashcard Set

## Details

IGCSE Physics Forces and Motion
IGCSE Physics Forces and Motion
29
Physics
10/24/2010

Term
 Acceleration
Definition
 The change in velocity in unit time. Vector
Term
 Acceleration formula
Definition
 Change in velocity/ Time takena=(v-u)/t
Term
 Average speed formula
Definition
 Distance travelled/ Time taken
Term
 Balanced forces
Definition
 They cause no change in motion
Term
 Change in momentum formula
Definition
 Force = change in momentum/ time taken
Term
 Displacement
Definition
 Distance moved in a stated direction. Vector
Term
 Force
Definition
 A push or a pull. Vector
Term
 Force formula
Definition
 F = ma
Term
 Friction
Definition
 Force which opposes motion
Term
 Gravitational field strength, g
Definition
 The force that gravity exerts on 1 kg (unit: N/kg)
Term
 Gravity
Definition
 Force that masses exert on each other
Term
 Hooke's law
Definition
 The stretching force is proportional to the extension if the elastic limit is not exceeded
Term
 Moment of a force formula
Definition
 Moment = force * distance from the pivot
Term
 Momentum formula
Definition
 p = mv
Term
 Newton's 3rd law
Definition
 When body B exerts a force on body A, then body A exerts an equal and opposite force on body B
Term
 Orbit
Definition
 A satellite will orbit a massive body due to gravitational attraction
Term
 Orbital speed formula
Definition
 Orbital speed = orbital circumference/time period=2*π*r/T
Term
 Principle of moments
Definition
 When a body is in equilibrium, the sum of the clockwise moments about any point equals the sum of anticlockwise moments
Term
 Scalar
Definition
 Quantity with only magnitude
Term
 Speed
Definition
 The distance travelled in unit time. Scalar
Term
 Stars, planets, moons ...
Definition
 Moons orbit planets which orbit stars
Term
 Stopping distance
Definition
 Thinking distance + braking distance
Term
 The universe contains ...
Definition
 ... one hundred thousand million galaxies each with one hundred thousand million stars
Term
 Unbalanced force
Definition
 A push or a pull which causes an acceleration
Term
 Unit of force
Definition
 Newton1N = 1kg * 1m/s2
Term
 Vector
Definition
 Quantity with both magnitude and direction
Term
 Velocity
Definition
 The distance travelled in unit time in a stated direction. Vector
Term
 Weight
Definition
 The force of gravity on an object
Term
 Weight formula
Definition
 W=mg
Supporting users have an ad free experience!