Acceleration

Question 1

Define acceleration

Answer 1

Acceleration = The rate of change of velocity

Question 2

Can the value of the acceleration be negative?

Answer 2

Yes. This is called deceleration

Question 3

What’s the unit of acceleration

Answer 3

m/s per second. We write it as m/s/s.
m/s/s can be simplified to m/s².

Actually, the unit depends on the input units you are measuring. If you want to measure changes in km/h per second instead of changes in m/s per second, the unit would be km/h/s.
Or cm/s/s
Or km/s/h

Whatever.

Question 4

Can acceleration be the change in direction

Answer 4

Yes. Acceleration is the change in velocity and velocity includes direction too.

Question 5

Acceleration formula

Answer 5

Acceleration is just change in velocity over time.

Acceleration = Δvelocity/time

Question 6

An important formula that links displacement, velocities, and acceleration is

Answer 6

v² - u² = 2ad
Where:
v: final velocity
u: initial velocity
a: acceleration
d: displacement