Movement and position Flashcards
What do distance-time graphs show?
how far away a object is from the base position compared to the time taken to reach there. Straight line shows constant speed.
What is Velocity?
The increase in displacement/time
What is acceleration?
Change in velocity / Time
What is the formula for acceleration?
a = (v-u) / t
What do Velocity time graphs show?
the speed of an object at that time. Level line shows constant speed. Gradient of straight line shows acceleration. Area under graph shows distance travelled
What is the equation for speed?
s = d/t
What is the equation for velocity?
v = d/t
When an unbalanced force acts on an object along/against the line in which the object is moving
The object will accelerate/decelerate
The bigger the unbalanced force
The bigger the acceleration
Force =
mass x acceleration (F=ma)
Stopping distance
Sum of the thinking distance and braking distance
Thinking distance and factors that affect it
The thinking distance is the time before the brakes are applied. It can be affected by tiredness, drugs and poor visibility. Distance travelled depends on the speed of the vehicle.
Braking distance and factors that affect it
The distance travelled after the brakes have been applied. It is affected by brake and tire condition and the condition of the road surface.