Equations and General Knowledge Flashcards
(41 cards)
How do you work out force?
change in momentum (kg m/s) divided by time (s)
How do you work out stopping distance?
Thinking distance add braking distance
What is thinking distance?
Distance a car travels in the drivers reaction time
What is braking distance?
Distance taken to stop a car once the brakes have been applied
How do you work out kinetic energy?
0.5 x mass x speed squared
1
- x m x v squared
2
How do you work out the change in gravitation potential energy?
m x g x h
mass x gravitational field strength x change in height
What is the units for gravitational field strength?
N/kg
N = Newton’s
What is our gravitational field strength on earth?
10
What are the 4 main energy stores?
mechanically
electrically
by heating
by radiation
How do you work out efficiency?
useful energy transferred divided by total energy supplied
What are the units for energy?
Joules (J)
How do you work out power?
work done divided by time taken
What are the units for power?
Watts (W)
What is frequency measured in?
Hertz (Hz)
How do you work out work done?
force x distance
How do you work out wave speed?
Frequency x wavelength
How do you work out acceleration?
change in velocity divided by time
What are the units for acceleration?
m/s squared
What do you use to measure speed of sound?
Oscilloscope
What are all the electromagnet waves called?
radio waves micro waves infra red visible light ultra violet x-rays gamma rays
How do you work out distance?
Speed x time
How do you work out speed?
Distance divided by time
How do you work out time?
Distance divided by speed
What is the mass and charge of a proton?
Mass = 1 Charge = +1