G484 Definitions Flashcards
net force on a body
Proportional to the rate of change of momentum
impulse of a force
Product of a force acting on a body and the time it’s acting
Area under a force/time graph
perfectly elastic collisions
A collision with no loss of kinetic energy
inelastic collision
Some loss of kinetic energy during the collision
radian
The angle where the arc of the circle equals the radius
2 pi = 360 degrees
gravitational field strength
Force per unit mass
period
Time for one complete oscillation
1/f
geostationary orbit
An orbit about the earth that has the same period of rotation as the Earth (24h) and is in the equatorial plane
displacement
Distance from the equilibrium position
Vector quantity
amplitude
The maximum displacement
frequency
Number of oscillations per unit time
1/T
angular frequency
Product of 2pi x frequency
phase difference
The difference between two points of equal magnitude on two separate waves
simple harmonic motion
Acceleration is directly proportional to displacement from the equilibrium position and always acting towards the centre
linear momentum
The product of mass and velocity
Newton’s 1st law
A body will remain at rest or continue to move with constant velocity unless acted upon by a force
Newton’s 2nd law
Force is proportional to the rate of change of momentum
Newton’s 3rd law
If object A exerts a force on object B, then object B exerts an equal but opposite force on object A
