A.1 Kinematics

Question 1

Scalars

Answer 1

Quantities that only have a magnitude

Question 2

Vectors

Answer 2

Quantities that have both magnitude and direction

Question 3

Distance

Answer 3

How far you have travelled

Question 4

Displacement

Answer 4

The distance travelled in a particular direction (How far and what direction you are from your starting point)

Question 5

Speed

Answer 5

The rate of change of distance (distance/time)

Question 6

Velocity

Answer 6

The rate of change of position (displacement/time)

Question 7

Acceleration

Answer 7

Rate of change of velocity (change in velocity/time)

Question 8

distance and displacement units

Answer 8

m

Question 9

speed and velocity units

Answer 9

ms^-1

Question 10

acceleration units

Answer 10

ms^-2

Question 11

instantaneous speed

Answer 11

the rate of change of distance at one particular time

Question 12

instantaneous velocity

Answer 12

The rate of change of position at one particular time

Question 13

instantaneous acceleration

Answer 13

The rate of change of velocity at one particular time

Question 14

average speed

Answer 14

the speed over a period of time

Question 15

average velocity

Answer 15

the velocity over a period of time

Question 16

average acceleration

Answer 16

the rate of change of velocity over a period of time

Question 17

Acceleration of freefall

Answer 17

9.8ms^-2 downwards

Question 18

what is the gradients equal to on a distance time graph

Answer 18

speed

Question 19

what is the gradient equal to on a displacement time graph

Answer 19

velocity

Question 20

what is the gradient equal to on a speed time graph

Answer 20

acceleration

Question 21

what is the area below the line equal to on a speed time graph

Answer 21

total distance travelled

Question 22

what is the gradient equal to on a velocity-time graph

Answer 22

acceleration

Question 23

what is the area below the line equal to on a velocity time graph

Answer 23

total displacement

Question 24

what is the area below the line equal to on an acceleration-time graph?

Answer 24

change in velocity

Question 25

Projectile

Answer 25

An object moving through the air under the influence of only one force- gravity. Its trajectory will be a parabola

Question 26

Reasons for the trajectory of a projectile being a parabola

Answer 26

• its vertical component of velocity is always changing due to the downwards force of gravity
• its horizontal component of the velocity is constant (assuming no air resistance)

Question 27

What does the trajectory of a projectile look like with air resistance?

Answer 27

-shorter range
- lower max height and reached earlier
- steeper gradient on the way down