1-33

Question 1

formula for speed

Answer 1

distance/time

Question 2

what is the unit for speed and type of quantity

Answer 2

m/s - scalar

Question 3

what is the vector quantity of speed

Answer 3

velocity

Question 4

formula for velocity

Answer 4

displacement/time

Question 5

formula for change in velocity

Answer 5

final velocity - initial velocity

Question 6

what is the rate of change of velocity

Answer 6

acceleration

Question 7

formula for acceleration

Answer 7

change in velocity/time

Question 8

unit for acceleration

Answer 8

m/s squared

Question 9

type of quantity of acceleration

Answer 9

vector

Question 10

if velocity is constant acceleration is?

Answer 10

0

Question 11

formula for decceleration

Answer 11

initital velocity-final velocity
/ time

Question 12

in a distance time graph what represents the speed?

Answer 12

the gradient

Question 13

how do you find the gradient of a distance time graph?

Answer 13

y1-y2
/ x1-x2

Question 14

in a speed time graph what does the gradient represent?

Answer 14

the acceleration

Question 15

how do you find the acceleration in the speed time graph?

Answer 15

change in velocity/time

Question 16

formula for force

Answer 16

mass x acceleration

Question 17

whats the unit of mass?

Answer 17

kg

Question 18

what is the unit of force?

Answer 18

kg ms^-2

Question 19

formula for weight

Answer 19

= mass x gravitational acceleration

Question 20

formula for moment

Answer 20

force x perpendicular distance from pivot

Question 21

principle of moment?

Answer 21

when an object is in equillibrium the some of the anticlockwise moments=clockwise moments

Question 22

what is hookes law?

Answer 22

force is directly proportional to the extension of the spring when a force is applied

Question 23

work done formula

Answer 23

force x distance moved in the direction of the force

Question 24

work done unit?

Answer 24

joules

Question 25

what are the 2 types of energy?

Answer 25

gpe and kinetic energy

Question 26

formula for gpe

Answer 26

mgh

Question 27

formula for ke

Answer 27

1/2 mv squared

Question 28

formula for power

Answer 28

work done/time

Question 29

unit of power

Answer 29

watts

Question 30

formula for efficiency

Answer 30

useful energy output x 100 / total energy input

Question 31

formula for density

Answer 31

mass/volume

Question 32

unit of density

Answer 32

kgm3

Question 33

pressure formula

Answer 33

force / area

Question 34

pressure in liquids formula

Answer 34

h ro g

Question 35

Boyle's law? ( pressure of gases )

Answer 35

pressure is inversely proportional to the volume when temperature and the amount of gas is constant

Question 36

boyles law formula

Answer 36

p1 v1 = p2 v2

Question 37

how do you investigate boyles law?

Answer 37

- trap a fixed amount if gas in a syringe - measure the initial volume of the gas - reduce the volume using the syringe - for each pressure applied record the corresponding volume - repeat this several times while keeping the temperature constant - plot a graph with the results

Question 38

what is the pressure law?

Answer 38

a fixed mass of a gas at constant volume the pressure is directly proportional to the kelvin temperature

Question 39

pressure law formula

Answer 39

p1/t1 = p2/t2 - temperature should be in kelvin

Question 40

how do you convert celcius to kelvin?

Answer 40

= tc + 273

Question 41

what is charles law?

Answer 41

if a fixed mass of gas at a constant pressure volume occupied is directly proportional to its absolute temperature

Question 42

what is radiation?

Answer 42

it is the transfer of heat through infrared waves

Question 43

what is the unit of charge?

Answer 43

coulomb