Physics Level 1 Flashcards
what is speed measured in?
ms-1 or kmh-1
what is the formula for speed?
v=d/t
on a distance-time where the line is straight horizontally what does that mean?
the object is stationary
on a distance-time where the line is on a 45-degree angle what does it mean?
the object is travelling at a constant speed
on a distance-time where the line is curving upwards, what does it mean?
that the object is accelerating
on a distance-time graph where the line is going up but then curves and flattens what does it mean?
that the object is decelerating
how do you find the speed from a distance-time graph?
you find the gradient of the line
what does accelerating and decelerating mean?
speeding up and slowing down
if something is travelling at a constant speed it is …?
zero
what is the formula for acceleration?
a=v/t
if something slows down the acceleration it will be …?
a negative
what is the formula to find the gradient of a speed-time graph?
gradient = rise/run
what is a force?
it is something which pushes or pulls an object
what is a vector?
something which has numbers and direction
is force a vector?
yes
