Calculate the total distance covered by a train before coming to rest if its initial...

Calculate the total distance covered by a train before coming to rest if its initial velocity is 30m/s with a constant retardation of 0.1m/s^2?

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Answers (7)

EmX
7 months ago
Write out your parameters.
Note that it's retardation, thus it's negative.

And since it comes to rest out final velocity is Zero.
HENRYVILLA
7 months ago
S = V^2−U^2/20

S = 0^2−30^2/2×0.1
Dolly P
7 months ago
a=-0.1m/s2
u=30m/s
v=0
S=?

V2=U2+2aS
0=(30x30)+2(-0.1)xS
0=90-0.2S
-90=-0.2S
S=90/0.2
S=450m
isaaq
7 months ago
s=?
u=30m/s
a=0.1m/s2
v=0
u2=u2+2as
0=(30*30)+2(0.1*s)
900+0.25=0
0.25=900
s=900/0.2
s=4500m
PaulB
7 months ago
FIRST WE NEED TO FIND TIME
A=V2_V1/T
-0.1=0-30/T
T=-30/-0.1
T=300SECONDS

S=UT + ½aT²
s=30x300] + [-0.1x 90000]/2
s=9000 -4500= 4500METRES
Aliyu
7 months ago
distance covered=speed/time =30/0.1=300m
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