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
what is the symbol for force?
F
what is the unit for force?
Newtons
what is the formula for force
F=ma
what is a support force?
a force which is acting upwards on an object
what is a weight force?
a force which is acting downwards on an object
what is a net force?
the total amount of force that is acting on an object
how do you work out net force? and what is it measured in
minus the smaller ones from the bigger on to get the answer in newtons
when something is accelerating is it unbalanced or balanced
Unbalanced
what is mass measured in?
Kg’s
