linear motion defs

Question 2

is velocity a scalar or vector

Answer 2

vector

Question 3

is acceleration a scalar or vector

Answer 3

vector

Question 4

is weight a a scalar or vector

Answer 4

vector

Question 5

units for mass

Answer 5

kg

Question 6

units for displacement

Answer 6

m

Question 7

units for velocity

Answer 7

m/s

Question 8

units for acceleration

Answer 8

m/s^2

Question 9

units for weight

Answer 9

N

Question 10

units for momentum

Answer 10

kg m/s

kilogram metres per second

Question 11

is momentum a scalar or vector

Answer 11

vector

Question 12

definition of mass

Answer 12

Physical quantity expressing the amount of matter or substance in a body from bone muscle fat tissue fluid

the quantity of matter a body possesses

Question 13

definition of weight

Answer 13

Downward force on a given mass due to gravity, external force, gravitational force that earth exerts on a body by pulling it down to the centre of the earth

Question 14

acceleration definition

Answer 14

Rate of change of velocity

Question 15

displacement definition

Answer 15

Length of a straight-line joining start and finishing points

Question 16

definition of velocity

Answer 16

The rate of change of displacement (how fast)

Question 17

momentum definition

Answer 17

Product of the mass and velocity of an object

Question 18

formula for weight

Answer 18

weight=mass x acceleration

Question 19

formula for acceleration

Answer 19

accel= change in velocity
time

Question 20

formula for velocity

Answer 20

velocity= displacement/
time taken

Question 21

formula momentum

Answer 21

momentum=mass x velocity

Question 22

is weight a vertical or horizontal force

Answer 22

vertical

Question 23

the greater the mass of the object the …… the weight …… them downwards

Answer 23

greater the weight
pulling them downwards

Question 24

is displacement a vector or a scalar

Answer 24

vector

Question 25

what is impulse (def) define impulse(2)

Answer 25

amount of time a force is applied to an object/body a measure of force applied over time, impulse = force x time (1) measured in Newton seconds Ns (1)

Question 26

impulse can be manipulated to change which 2 things

Answer 26

momentum or velocity

Question 27

formula for impulse

Answer 27

impulse= force X time (equates to change in momentum unless zero impulse

Question 28

what are the units for impulse

Answer 28

Newton seconds (Ns)

Question 29

is impulse a scalar or vector

Answer 29

vector

Question 30

what are the units for the axis in an impulse graph

Answer 30

y is force in newtons x is time in seconds or milliseconds

Question 31

the acceleration that a performer achieves when sprinting or high jumping is related to impulse, what do you understand by the term impulse and how does the athletes use impulse during their sprint or take off (3)

Answer 31

impulse is force x time it equates to the change in momentum there is constant mass impulse has direction it represents a single footfall +impulse for accel at take off -impulse when foot lands net impulse positive = accel could draw an annotated graph

Question 32

if the length of a race is 1.5km from start to finish in a straight line what is the displacement

Answer 32

1500m

Question 33

if a race is 40km in a loop what is the displacement

Answer 33

0m