measurements,density, acceleration
density of water
1 g/mL (or 1 g/cm³)
calculating the density of a liquid
1)weigh it 2)Use a measuring cylinder to measure its volume 3)perform calculations`
difference between displacement and distance travelled
1.The distance travelled by a moving body is the actual length of the path covered by the body irrespective of direction. ... 1.The displacement of a body is the shortest distance between the initial and final position of the body. 2.Displacement is a vector quantity. 3.Displacement may be positive,negative or zero
frequency of a ticker timer
50 Hz so time between each one is 0.02 seconds
ticker timer
Device used to show movement in science laboratories. It places dots on paper at a rate of 50 dots per second (50 Hz).
speed
Distance travelled per unit time
Force equation
F=ma
difference between speed and velocity
Velocity has direction and speed does not
Acceleration equation
a=vf-vi/t
calculating the density of a regular solid
calculate volume and mass and do p=m/v
v=
d/t
velocity equation
displacement/time (d/t)
speed=
distance/time
how to calculate acceleration
final velocity-initial velocity/time
how to calculate distance travelled on a speed-time graph
find the area under the line
density =
m/v
Weight equation
mass x gravity (w=mg)
Density of an Irregularly Shaped Object
put 100cm3 of water in a measuring cylinder put the solid in its volume is the amount of water it has displaced d=m/v so you divide the mass by volume
What is acceleration?
rate of change of velocity
Speed-time graph
shows the speed of an object on the y-axis and time on the x-axis