Motion Flashcards
1
Q
motion
A
when an object changes position relative to a fixed point
2
Q
scalar quantities
A
- involve only a magnitude
- no not have a direction
- only have a numerical value
3
Q
vector qualities
A
- magnitude and direction
- described with descriptive terms or positive and negative numbers
4
Q
speed
A
how far an object has travelled per unit time, the rate of change of position
5
Q
velocity
A
speed with direction
6
Q
types of speed
A
- instantaneous (speed at any given moment in time
- average (total distance travelled divided by the total time taken)
- constant (speed that doesn’t vary)
7
Q
force
A
- push pull or twist when 2 or more objects or entities interact with each other
8
Q
characteristics of forces
A
- have a magnitude
- have direction
- measured in newtons
8
Q
inertia
A
the tendency of an object to resist change in motion
9
Q
newton’s first law
A
an object at rest will remain at rest, and an object in motion will continue travelling at the same speed in the same direction unless acted upon by an unbalanced force
10
Q
newton’s second law
A
when a force acts upon a mass, acceleration is produced
F = ma
net force on an object = mass x acceleration
11
Q
newton’s third law
A
for every action there is an equal and opposite re-action
