Unit 9B- Definitions - Motion Flashcards
1
Q
Scalar
A
A quantity with magnitude (size) only
2
Q
Vector
A
A quantity with magnitude and direction
3
Q
Displacement
A
Distance moved in a straight line from start to finish in the direction of that straight line
4
Q
Average speed
A
Distance travelled divided by time taken
5
Q
Velocity
A
Speed in a specific direction
6
Q
Gradient
A
Steepness
7
Q
Acceleration
A
Change in velocity per second
8
Q
Deceleration
A
Slowing down (negative acceleration)
9
Q
Newton’s 2nd law
A
Force ∝ mass x acceleration
10
Q
Newton’s third law
A
When two objects interact, the forces on each other are equal, opposite and the same type
11
Q
Centripetal force
A
The (resultant) force causing circular motion
