physics
posted by valerie on .
the speed of a cyclist reduces uniformly from 2.5 m/s to 1.0 m/s in 12 s.
(a) calculate the deceleration of the cyclist.
(b) calculate the distance travelled by the cyclist in this time

Sol
Accelaration=F.VI.V/TIME TAKEN
NOW WE CAN SAY THAT,
a=02.5/12
a=2.5/12
a=0.2083 
a) Acceleration or deceleration = Final velocity  initial velocity / Time taken
D = 12.5 / 12
D= 0.125
b) d = ½×(Vi + Vf) × t
where
d = displacement = ?
Vf = final velocity = 1 m/s
Vi = initial velocity = 2.5 m/s
t = time = 12 s
so
d = ½×(2.5 + 1) × 12
d = 21 m