Velocity And Acceleration

Question 1

What is the difference between distance and displacement?

Answer 1

Distance is a scalar quantity measuring total length travelled. Displacement is a vector quantity measuring the change in position from the start.

Question 2

If you complete a full lap on a 400m track, what are your distance and displacement?

Answer 2

Distance = 400m, Displacement = 0m.

Question 3

What is speed, and is it a scalar or vector quantity?

Answer 3

Speed is how distance changes over time; it is a scalar quantity.

Formula:

Speed
=d/t

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Question 4

What is velocity, and is it a scalar or vector quantity?

Answer 4

Velocity is how displacement changes over time; it is a vector quantity.

Formula:

Velocity
= s/t
​

Question 5

What is acceleration?

Answer 5

Acceleration is the rate at which velocity changes over time. It is a vector quantity.

Formula:

𝑎 = v/t
​

Question 6

What are the SI units for speed, velocity, and acceleration?

Answer 6

Speed & Velocity: m/s
Acceleration: m/s²
Time: seconds (s)

Question 7

How do you interpret positive and negative acceleration?

Answer 7

Positive acceleration: Velocity increases in the positive direction.
Negative acceleration (deceleration): Velocity decreases or increases in the opposite direction.

Question 8

What is uniform acceleration?

Answer 8

Acceleration is constant, meaning velocity changes by the same amount per second.

Question 9

What is non-uniform acceleration?

Answer 9

Acceleration is changing, meaning velocity increases by different amounts per second.

Question 10

What is another way to write the acceleration formula?

Answer 10

a= (v−u)/t
​

where:

a = acceleration
v = final velocity
u = initial velocity
t = time