Topic 1 - Motion

Question 1

quantity

Answer 1

something we can measure and give a numerical value to

Question 2

scalar quantity

Answer 2

quantities that have only magnitude (size)

Question 3

vector quantity

Answer 3

quantities that have magnitude (size) and a direction

Question 4

acceleration word equation

Answer 4

acceleration (m/s)2 = change in velocity (m/s)
time taken (s)

Question 5

velocity

Answer 5

the speed of something in a given direction

Question 6

speed calculation

Answer 6

speed = distance / time

Question 7

acceleration

Answer 7

a change in velocity

Question 8

how to work out starting velocity (u)

Answer 8

u = at - v

Question 9

how to work out final velocity (v)

Answer 9

v = at + u

Question 10

how to work out distance (x)

Answer 10

x = v squared - u squared / 2a

Question 11

momentum

Answer 11

a combination of mass and velocity

Question 12

force

Answer 12

a force that acts towards the centre of the Earth

Question 13

speed

Answer 13

tells you how far something moves in a certain time

Question 14

displacement

Answer 14

the distance from start to finish in a straight line; displacement for a journey is usually less than the distance travelled

Question 15

name some vector quantities

Answer 15

acceleration, displacement, velocity, force, momentum, weight

Question 16

name some scalar quantities

Answer 16

distance, temperature, time, speed, density, mass, energy

Question 17

distance equation

Answer 17

distance = average speed x time

Question 18

time equation

Answer 18

distance / speed

Question 19

velocity equation

Answer 19

displacement / time

Question 20

equation for acceleration with distance

Answer 20

acceleration = v squared - u squared / 2 x distance

Question 21

what are all forces

Answer 21

all vectors (all have magnitude and a direction)

Question 22

instantaneous speed

Answer 22

speed at a particular point in a journey

Question 23

how do u measure time in a laboratory when working out the speed

Answer 23

using light gates - its more accurate than using a stopwatch

Question 24

on a distance/time graph what does a horizontal line mean

Answer 24

the object is stationary

Question 25

on a distance/time graph what does a straight/sloping line mean

Answer 25

the object is travelling at a constant speed (the sleeper the line, the faster the object is travelling)

Question 26

how is speed calculated using a distance/time graph

Answer 26

the gradient of the line is the speed

Question 27

units for acceleration

Answer 27

metres per second squared

Question 28

acceleration symbol equation

Answer 28

a = v - u t a - acceleration v - final velocity u - initial velocity t - time taken for the change in velocity

Question 29

deceleration

Answer 29

when acceleration causes an object to get slower

Question 30

what’s the earths force of gravity

Answer 30

9.8m/s2 or 10m/s2

Question 31

on a velocity/time graph what does a horizontal line mean

Answer 31

the object is travelling at constant velocity

Question 32

on velocity/time graph, what does a straight/sloping line mean

Answer 32

object is accelerating - the steeper the line the greater the acceleration

Question 33

on a velocity/time graph what does a a line that is sloping downward mean

Answer 33

it’s decelerating (slowing down)

Question 34

how do you workout the acceleration from a velocity/time graph

Answer 34

the gradient of a line is the acceleration

Question 35

what does a negative velocity mean (line below the horizontal axis)

Answer 35

show the object moving in the opposite direction

Question 36

how to calculate the distance travelled from a velocity/time graph

Answer 36

workout the area of the shape (area under the line)

Question 37

If an object is moving at constant velocity what is the value of the acceleration?

Answer 37

There is no acceleration