Topic 3

Question 1

speed and velocity are both about

Answer 1

how fast you are going

Question 2

speed is

Answer 2

how fast

Question 3

velocity is

Answer 3

how fast and what direction

Question 4

speed (v)=

Answer 4

distance (d)/ time (t)

Question 5

acceleration is

Answer 5

how quickly velocity is changeing

Question 6

acceleration is a …….. quantity

Answer 6

vector

Question 7

acceleration (a)=

Answer 7

(v-u) / t

Question 8

in a distance time graph, gradient =

Answer 8

speed

Question 9

in dt graph, flat sections are where

Answer 9

it’s stopped

Question 10

in dt graph, steeper the graph

Answer 10

faster it is going

Question 11

in dt graph, down hill sections mean its

Answer 11

going back toward its starting point

Question 12

in dt graph, curves represent

Answer 12

acceleration or decceleration

Question 13

in dt graph, a levelling off curve means

Answer 13

it’s slowing down

Question 14

in vt graph, gradient =

Answer 14

acceleration

Question 15

in vt graph, flat sections represent

Answer 15

steady speed

Question 16

in vt graph, the steeper the graph

Answer 16

the greater the acceleration of deceleration

Question 17

in vt graph, uphill sections are

Answer 17

acceleration

Question 18

in vt graph, downhill sections are

Answer 18

deceleration

Question 19

the are under any section of vt graph is

Answer 19

distance

Question 20

a curve means changing (in vt graph)

Answer 20

acceleration

Question 21

arrows show the

Answer 21

size and direction of forces

Question 22

the force of gravity is acting

Answer 22

downwards

Question 23

the reaction force of gravity is pushing

Answer 23

the object back up

Question 24

without reaction force, an object would accelerate

Answer 24

downwards due to gravity

Question 25

to move with a steady speed,

Answer 25

the forces must be balanced

Question 26

you only get acceleration with an overall

Answer 26

resultant (unbalanced ) force

Question 27

the bigger the unbalanced force,

Answer 27

the greater the acceleration

Question 28

mass is measured in… &

Answer 28

kg and always stays the same

Question 29

weight is a force and is measured in

Answer 29

newtons

Question 30

weight =

Answer 30

mass X gravitational field strength

Question 31

falling objects in a vacuum

Answer 31

accelerate at the same rate

Question 32

when there is air resistance,

Answer 32

not everything accelerates at the same place because of the resistance

Question 33

objects falling though an atmosphere reach

Answer 33

a terminal velocity

Question 34

on earth when something falls, at first there is

Answer 34

much more weight than resistance

Question 35

as speed increases

Answer 35

so does the air resistance, until eventually the air resistance is equal to the weight

Question 36

when two bodies interact they

Answer 36

exert a force on each other

Question 37

if you push something,

Answer 37

it will push you back just as hard

Question 38

smaller mass pushing on bigger mass,

Answer 38

will move quicker away because she is lighter

Question 39

if there is zero resultant force then the body will remain at rest

Answer 39

or if it’s already moving it will carry on at the same velocity

Question 40

a resultant forces means

Answer 40

acceleration

Question 41

acceleration can take forms;

Answer 41

starting, stopping, speeding up, slowing down and changing direction

Question 42

force is a what quantity

Answer 42

vector

Question 43

the bigger the mass the

Answer 43

smaller the acceleration

Question 44

big mass needs bigger force to

Answer 44

accelerate as much as a small mass

Question 45

force =

Answer 45

mass X acceleration

Question 46

you can investigate f=ma with

Answer 46

a trolled experiment