Motion T1a

Question 1

What are Vector quantities?

Answer 1

Vector quantities have a magnitude (size) and a direction

Question 2

What are Scalar quantites?

Answer 2

Scalar quantities only has a magnitude and no direction

Question 3

Examples of Vector quantities?

Answer 3

Force, velocity, displacement, weight, acceleration, momentum, etc.

Question 4

Examples of Scalar quantities?

Answer 4

Speed, distance, mass, energy, temperature, time, etc.

Question 5

What is the difference between speed and velocity?

Answer 5

Speed is just how fast you’re going (e.g 30mph or 20m/s) with no regard to direction, e.g. 30 mph north or 20 m/s 060 degrees.

Question 6

How to calculate distance traveled (m)?

Answer 6

(Average) speed (m/s) X time (s)

Question 7

What is Acceleration?

Answer 7

Acceleration is the change in velocity in a certain amount of time

Question 8

How do you work out Acceleration?

Answer 8

Acceleration (m/s) = change in velocity (m/s) / time (s)

Question 9

How do you work out Uniform acceleration?

Answer 9

Final velocity (m/s) squared - initial velocity (m/s) squared = 2 X Acceleration (m/s2) X Distance (m)

Question 10

How do the different parts of a distance/time graph describe the motion of an object?

Answer 10

The gradient (slope) at any point gives the speed of the object.
Flat sections = stopped.
steeper curve = faster.
Curves = acceleration.
A curve getting steeper = speeding up (increasing gradient)
A levelling off curve = slowing down (decreasing gradient)

Question 11

How do the different parts of a velocity/time graph show the acceleration of an object?

Answer 11

Gradient = acceleration
Flat sections represent a steady speed
Uphill sections (/) are acceleration
Downhill sections (\) are deceleration
A curve means changing acceleration