Quiz 1 Flashcards
Name the force: The force which acts against motion when 2 surfaces run against each other
Friction
Name the force: The force which acts upwards on an object with wings
Lift
Stat the equation linking force, spring constant and extension
F=ke
Name the force which acts against motion when an object moves through air
Air resistance
State the name and the power of 10 for this prefix:G
Giga, 10 to the power of 9
Define a scalar quantity
A quantity with magnitude and no direction
Name the force: the force exerted by an engine
Thrust
State the equation linking weight mass and gravitational field strength
W=mg
Which store of energy is stored in an object when it is deformed elastically?
Elastic potential energy
When forces are in the opposite direction, how do we work out the resultant force?
Subtract
What other unit is a newton-metre equivalent to
Joule or J
What 2 phrases do we use for when an object has a resultant force of 0N acting on it?
The object is in equilibrium OR the forces are balanced
How is extension calculated?
Stretched length - original unstretched length
What measuring instrument is used to measure mass?
Mass balance
State hooked law
The extension of a spring is directly proportional to the force applied, provided that the limit of proportionality is not reached
