Science module 3 Flashcards
module 3 (24 cards)
What does Newtons third law state?
For every action there is an equal and opposite reaction
Who created newtons laws?
Sir Isaac Newton
What does the difference in air pressure in a balloon produce?
Upthrust (upward force)
When did Sir Isaac Newton publish his laws of motion?
1687
What is force measure in?
Newtons
What is weight measure in?
Newtons
What is mass measured in?
Kilograms (kg)
What is the gravitational field strength of the earth?
10 N/kg
What happens when forces acting on an object are the same size?
They are balanced
What is it called when a two balanced objects cancel each other out?
Equilibrium
What are newtons measure with?
Newtonmeter
What is it called when two objects are not the same size?
Unbalanced (don’t cancel each other out)
Give examples of two contact forces.
Friction and drag
Give examples of two non-contact forces.
Gravity, Magnetic forces
How can friction be reduced?
Lubrication
What is lubrication?
When you apply oil or grease to something to make it run smoother
What is the name of a pair of forces?
Interaction pair
What kind of force is air resistance?
Contact/ drag
What is dissipation?
When thermal energy gets transferred to surroundings (also known as wasted energy)
Who first used the term “Law of conservation of energy”?
William Rankine
When did William Rankine first say the phrase ‘Law of conservation of energy”?
1850
How can dissipation due to friction be reduced?
Lubrication
How can dissipation due to conduction, convection or radiation be reduced?
insulation
