What is standard notation?
It is the way of writing numbers by powers of ten.
1 decimetre in metre?
0.1m
1 centimetre in metre?
0.01m
1 millimetre in metre?
0.001m
1 micrometre in metre?
0.000001m
1 kilometre in metre?
1000m
How do you find density?
mass over volume
How do you find the volume of a irregular shape?
By using a measuring cyclinder and water
Volume of irregular object = measurement after - measurement before
What is the easy way of measuring the length of one sheet of paper?
Measuring the length of 100 sheets of paper and dividing it by 100
How do you find the average speed?
Distance moved over time taken
What is a scalar quantity ?
Quantity that only has the magnitude(size)
What is a vector quantity?
Quantity that has magnitude and direction
What is velocity?
It is speed that also has direction
What is Acceleration?
Rate of change of velocity
What is the equation for acceleration?
a = (v-u)/t
What is the difference between distance and displacement?
Distance is a scalar quantity where how much something has moved
Displacement is a vectore quantity where it is when how far something moved from one place
How do you find the distance by the speed time graph?
By finding the area under the speed time graph
What is the name of the acceleration during falling in Earth known as ?
Gravitational field strength
How much is the gravitational field strength on Earth?
10m/s^2 (9.8m/s^2)
What happens if a feather and a bowling ball fall in a vacuum? Why?
They fall at the same time because there is no air resistance acting more on the lighter object.
What is terminal velocity?
It is when the weight and the air resistance is the same an the resultant force equals to zero.
What happens to the air resistance if a falling object’s speed increases?
The air resistance also increases
What is mass?
A measure of the quantity of matter in an object at rest relative to an observer
What is weight?
A gravitational force on an object that has mass
