physics Flashcards
1
Q
Equation for speed
A
speed = distance over time
2
Q
equation for density
A
density = mass over volume
3
Q
define mass
A
amount of matter in object (measured in kgs)
4
Q
define weight
A
effect on gravity (measured in newtons)
5
Q
rules of force
A
- nothing goes or stops without force
-force can changes speed or shape of an object
-force can be touching or can be non touching (eg magnetism and gravity)
-force is push or pull
6
Q
balanced forces mean
A
constant speed (including still)
7
Q
Unbalanced forces means
A
acceleration or deceleration
