Mass And Weight Flashcards
what does the gradient of a distance-time graph represent
the speed of an object
what is velocity
its speed in a particular direction
what does the slope on a distance time graph represent?
the acceleration of an object
how to find acceleration on the graph
velocity / time in s
what does the gradient of a velocity-time graph represent?
the acceleration
what does the area under a velocity time graph represent
the distance covered
what is mass
how much stuff there is in a object
what is weight
how much including gravity the mass weighs.
how is weight calculated
mass x gravitational field strength
how is ‘work done’ calculated
force x distance
what is density
mass per unit volume
how to calculate density
mass / volume
how can you measure density of an irregular shape
water displacement using an eureka can. the volume of the object is equal to the volume of the water that is forced through the spout
what is newtons first law of motion
objects with greater mass will resist change in motion more that objects with less mass.
how do you calculate resultant forces
mass x acceleration
what is hooke’s law?
when an elastic object such as a spring it stretched, the increased length is called it’s extension. the extension of an elastic object is directly proportional to the force applied to it.
how to measure force
constant x extension
why would the equation not work
when the limit of proportionality is exceeded.
what is the extension
the new length minus the unloaded length
what is the gradient of the line called
the spring constant, k
what does the greater the value of k mean
the stiffer the spring
what is newtons second law of motion
the relationship between force mass and acceleration
what happens if the mass is the same
more force causes more acceleration
less force causes less acceleration
what happens if the force is the same
more mass causes less acceleration
less mass causes more acceleration