1 - 3 Forces and movement
● ***An object will not change velocity (not accelerate/decelerate) unless an
unbalanced force acts on it
●
1
● *** F (force )=m(mass)∗a(acceleration) (also F ∝ a , a ∝ )
m
Stopping distance (of vehicle)
● If driver spots danger in front of vehicle, vehicle will still keep moving for brief period
due to driver’s reaction time
● *** Stopping distance=thinking distance (reaction time)+braking distance
●
1
, ●
2
● ***An object will not change velocity (not accelerate/decelerate) unless an
unbalanced force acts on it
●
1
● *** F (force )=m(mass)∗a(acceleration) (also F ∝ a , a ∝ )
m
Stopping distance (of vehicle)
● If driver spots danger in front of vehicle, vehicle will still keep moving for brief period
due to driver’s reaction time
● *** Stopping distance=thinking distance (reaction time)+braking distance
●
1
, ●
2
