definitions Flashcards
1
Q
definition of acceleration?
A
how quickly an object increases in speed in a certain direction
2
Q
equation for acceleration?
A
change in velocity / time taken
–also known as
(v-u) / t x a
3
Q
definition of energy?
A
a property that cannot be created nor destroyed, only transferred
4
Q
how to find the efficiency of energy output?
A
total output - output lost (as a percentage)
5
Q
define momentum
A
the product of mass and velocity
6
Q
equation for momentum?
A
mass x velocity
7
Q
define force?
A
a push or pull that acts on an object that causes a change in velocity
