Key concepts topic 1 Flashcards
1
Q
Speed (m/s)
A
speed= distance/ time
2
Q
Force (N)
A
force= mass (kg) x acceleration (m/s^2)
3
Q
Acceleration (m/s^2)
A
acceleration = change in velocity / time
= v-u/ time
4
Q
Kinetic energy (J)
A
KE= 1/2 x mass x velocity^2
5
Q
distance (m)
A
distance = speed x time
6
Q
Gravitational potential energy (J)
A
GPE = mass x gravitational field strength x (change in ) height
7
Q
efficiency (J)
A
efficiency= useful energy output/ total energy input
8
Q
work done (J)
A
work done= force x distance
9
Q
Power (J)
A
power= work done/ time
10
Q
density (kg/m^3)
A
density = mass (kg) / volume (m^3)
11
Q
momentum (kg m/s)
A
momentum= mass (kg) x velocity (m/s)
