Quiz 2 Flashcards
How do we check that 2 variables are inversely proportional
Multiply the variables at least 3 times. Answer should be the same everytime
State the unit of extension
Metres
When is work done on an object?
When a force causes the object to move through a distance in the same direction as the force
What is the spring constant?
The quantity which measures how stiff a spring is
When work is done against the frictional forces acting on an object, what happens to the object
It’s temperature increases
What are non-contact forces
Forces which do not require the 2 objects to touch
What does a directly proportional relationship look like on a graph?
Straight line through the origin
In what direction do drag forces like friction and air resistance always act
The opposite direction to the motion
Stat the unit of spring constant
Newtons per metre
State the name AND the power of 10 for this prefix: n
Nano, 10 to the power of -9
How can the spring constant be calculated from a force- extension graph?
The gradient of the graph
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
State the unit of distance
Metres
What is elastic deformation
An object is deformed, but when the force is removed it goes back to its original length
When work is done, what is transferred
Energy
Name the force: The force which acts upwards on an object in a fluid
Upthrust
State the unit of work
Joules
Why is weight different on different planets?
The gravitational field strength is different
State the equation linking work done, force and distance in symbols
W= Fs
State the unit of gravitational field strength
Newtons per kilogram
What does W stand for in the equation W= Fs
Work done(J)
What does F stand for in the equation W=Fs
force(N)
What does S stand for in the equation W=Fs
Distance(m)
state the equation linking work done,force and distance in words
work done= force x distance
