Mechanics

Question 1

What is the equation for density?

Answer 1

Mass divided by volume

Question 2

What is the density of water?

Answer 2

1000kg/m^3
Or
1g/cm^3

Question 3

If the density of a substance is lower than the density of water what will happen?

Answer 3

Will not mix
Will float on top of water

Question 4

Define relative density

Answer 4

The ratio of the mass of any volume of it to the mass of an equal amount of water.

Question 5

What is meant by force?
And what is the equation used to calculate it?

Answer 5

Force is the product of mass and acceleration
Force = Mass x acceleration

Question 6

Define speed, velocity and acceleration

Answer 6

Speed is the rate of change of a distance
Velocity is the rate of change of displacement
Acceleration is the rate of change of velocity

Question 7

How do you calculate momentum?

Answer 7

Mass x velocity

Question 8

Explain the 3 different classes of levers

Answer 8

Class 1 - has the fulcrum placed between the effort and load