Forces and Motion

Question 1

Upthrust

Answer 1

upwards force on a body due to displacement of water around it. sometimes called bouyancy

Question 2

Lift

Answer 2

upwards force on an aeroplane

Question 3

Weight

Answer 3

force due to gravitational attraction

Question 4

Friction

Answer 4

force created my particles rubbing of surfaces that opposes motion

Question 5

air/water resistance

Answer 5

frictional force caused by particles colliding with the body that opposes motian

Question 6

magnetic

Answer 6

force caused by magnetic attraction

Question 7

Electrostatic

Answer 7

force caused by attraction between charges

Question 8

reaction

Answer 8

forces created by a body as a reaction to a force being applied

Question 9

compression

Answer 9

Force on a body when it is being squashed

Question 10

Tension

Answer 10

force on a body when it is being stretched

Question 11

non-contact

Answer 11

if two objects or materials dont need to be touching for a force to have an effect

Question 12

contact

Answer 12

if two objects or materials need to be touching for an force to have an effect

Question 13

what are the two types of friction

Answer 13

static friction and dynamic friction

Question 14

what is static friction

Answer 14

force to prevent an object from starting to move

Question 15

what is dynamic friction

Answer 15

force that acts when something has started moving

Question 16

equation for average speed

Answer 16

average speed = total distance divided by total time

Question 17

equation for acceleration

Answer 17

acceleration = change in velocity divided by change in time

Question 18

equation to find the force

Answer 18

force - mass times acceleration

Question 19

equation for weight

Answer 19

mass times gravitational field strength

Question 20

what is weight

Answer 20

weight is the force that pulls all objects to the centre of the planet, it depends on the mass and gravitational field strength of an object.

Question 21

what would happen to your weight if it went to a place of a different gravitational field strength

Answer 21

it would change

Question 22

what would happen to your mass if you went to a place of a different gravitational field strength

Answer 22

it would stay the same since the amount of matter hasnt change only the gravitational field strength

Question 23

when would a falling parachutist reach terminal velocity

Answer 23

when its air resistance and weight are the same

Question 24

what is a ticker timer

Answer 24

ticker timer is a tape that marks dots to measure speed and it does this by marking dots at at a certain rate to show distance travelled in a certain time

Question 25

what is the rate of a ticker timer

Answer 25

50 dots per second (1/50s)

Question 26

what is balanced forces

Answer 26

balanced forces is two forces going in opposite directions that have the same amount of newtons and balance each other out

Question 27

what is unbalanced forces

Answer 27

unbalanced forces is when forces acting on an object are not equal and have different amount of newtons, it causes an object that doesn't move to move and an object moving to change speed or direction

Question 28

what is a resultant force

Answer 28

a resultant force is made when there is forces acting on an object, when it is zero then the object wont change what its doing but when it isn't zero it will make un unbalanced force

Question 29

what does stationary look like on a distance time graph

Answer 29

a flat horizontal straight line

Question 30

what does a constant speed look like on a distance time graph

Answer 30

a tilted straight line

Question 31

what does an acceleration look like on a distance time graph

Answer 31

a curve - backward c

Question 32

what does deceleration look like on a distance time graph

Answer 32

a curve - forward c

Question 33

what does a constant acceleration look like on a velocity time graph

Answer 33

a straight diagonal line

Question 34

what does constant speed look like on a velocity time graph

Answer 34

a flat straight horizontal line

Question 35

what does an acceleration look like on a velocity time graph

Answer 35

a curve

Question 36

what does a deceleration look like on a velocity time graph

Answer 36

a curve

Question 37

what type of graph does terminal velocity occur

Answer 37

velocity time graph

Question 38

how do you find the total distance travelled from a velocity time graph

Answer 38

you calculate the area below the line

Question 39

what forces occur on a hanging object

Answer 39

tension and weight

Question 40

what forces occur on a moving floating object (on water)

Answer 40

up thrust and weight (vertical), thrust and water resitance (horizontal)

Question 41

what forces occur on a stationary object: block on a table

Answer 41

weight and reaction

Question 42

what forces occur on a moving car at constant speed

Answer 42

friction and thrust are equal lengths (horizontal), reaction and weight

Question 43

what forces occur on a car accelerating

Answer 43

friction smaller than thrust, reaction and weight

Question 44

what forces occur on a rifle shooting with a kick back

Answer 44

thrust bigger than reaction

Question 45

what forces occur with a rocket taking off

Answer 45

lift bigger than reaction

Question 46

what forces occur at a parachutist at terminal velocity

Answer 46

air resistance and weight are equal

Question 47

what forces occur for a parachutist accelerating

Answer 47

weight bigger than air resistance

Question 48

how many metres are in a mile

Answer 48

1600

Question 49

thrust

Answer 49

forwards force created by a body