A car is traveling at 72km/h decelerates uniformly at 2 m/s^2. calculate
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u=72km/h(20m/s)
v=0m/s
a= -2m/s^2
s=?
t=?
Using 3rd eq. of motion
v^2-u^2=2as
-400=-4s
s=100m
Using 1 st eq. of motion
v=u+at
0=20+(-2)t
-20=-2t
Time=10 seconds
v=0m/s
a= -2m/s^2
s=?
t=?
Using 3rd eq. of motion
v^2-u^2=2as
-400=-4s
s=100m
Using 1 st eq. of motion
v=u+at
0=20+(-2)t
-20=-2t
Time=10 seconds
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