1.3 - Acceleration

Question 1

______ is defined as a change in velocity during a specific time interval

Answer 1

Acceleration

Question 2

With acceleration there is a ______

Answer 2

Direction

Question 3

Acceleration formula

Answer 3

-> ->
a (m/s^2) =🔺v(change in velocity)(m/s)
—-
🔺t (change in time) (s)

** velocity is final - initial

Question 4

Velocity is a ______ quantity so it has both ______ and ______

Answer 4

Vector
Magnitude
Direction

Question 5

An acceleration object can be changing ______ and / or ______

Answer 5

Speed

Direction

Question 6

Positive/negative acceleration rule:

Positive acceleration: change in BOTH magnitude and direction of velocity are positive/negative

Negative acceleration: change in magnitude of velocity is negative and direction is positive (or vice versa)

Answer 6

Like Math

+)(+)=(+
(-)(-)=(+)
(-)(+)=(-)
(+)(-)=(-)

Question 7

Acceleration is metres per second squared or metres per second per second, why?

Answer 7

m/s
—- = (m/s) x (1/s) = m/s^2
s

Question 8

Position time graphs

Slope = velocity

Accelerating object has changing velocity

Acceleration has a changing slope on position time graphs

Answer 8

Important ^^^

Question 9

Position time graphs

Positive and negative acceleration

Answer 9

Smile (+) acceleration

Frown (-) acceleration

Question 10

Graph summary:

Position time graph and velocity time graph

Answer 10

Position time graph

• slope = velocity
• area under curve is meaningless

Velocity time graph

• slope = acceleration
• area under curve means displacement