Motion Flashcards
What is scalar
Scalar is a quantity which has size
What is vector?
Vector is a quantity which has size and direction
What is distance
How far apart two points are
What is displacement
The distance in a particular direction
What is speed
Rate of change of distance
What is velocity
Rate of change of displacement
What is acceleration
Rate of change of velocity
What can happen to an object when it accelerates
Speed up, slow down or change direction
Formulas for average speed
Total distance over time
I.S+F.S over 2
Formula for rate of change of speed (RCS)
F.S-I.S over time
Formulas for average velocity
Displacement over time
I.V+F.V divided by 2
Formula for acceleration
F.V-I.V divided by time
Formula for distance/speed/time.
Distance=SpeedxTime
Time= Distance over speed
What is density
The density of an object is its mass per unit volume.
What is the experiment to investigate the relationship between mass and volume for density?
Apparatus:
At least 3 blocks of same material, different sizes
Ruler
Electronic balance
Method:
Measure the mass of block using electronic balance
Measure length, breadth and height using ruler
Record results
Draw graph of mass (y) against volume (x)
Diagram:
Rectangle
Equation for volume
Volume=length x breadth x height
Formula for density
Density=Mass divided by volume
Formula for resultant force
Fres=mxa
List the units for density mass and volume
Density: cubed kg/g g/cm
mass: kg or g
volume: cubed m/cm
Experiment to find the density of a liquid
Apparatus: Measuring cylinder
Electronic balance
Method:
Measure mass of empty cylinder using electronic balance
Add liquid to cylinder and record new mass
Find mass of liquid by subtracting the mass of empty cylinder
Measure volume using cylinder
Calculate density
Experiment to find the density of an irregular object
Apparatus: Electronic balance
Measuring cylinder
Method:
Measure mass of object using electronic balance
Add water to cylinder
Measure volume of water in cylinder
Submerge object in liquid (avoid splashes)
Measure new volume of water+object
Calculate volume of object
Calculate density
Repeat to increase reliability
