8. A trein is travelling at a speed of 90 km/h. Brakes are applied so as to produce a uniform
acceleration of -0.5 m/sec. Find how far the train will go before coming to rest
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Answer:
Step-by-step explanation:
u (initial velocity)=90km/hr
To convert it into m/s= 90*5/18
=25m/s
v (final velocity)= 0 as car stops
Acceleration= -0.5 m/s square
Distance=?
Time=0 -25/-0.5
= 50 seconds
S= ut+1/2 at square
= 25*50+1/2*-0.5*(50)2
=1250-625
=625m
Hope it helps
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