At a distance L=400m from the traff...
Question  # At a distance ( L=400 mathrm{m} ) from the traffic light, brakes are applied to a locomotive moving at a velocity ( v=54 mathrm{km} / mathrm{hr} . ) Determine the position of the locomotive relative to the traffic light 1 minute after the application of the brakes if its acceleration is ( -0.3 mathrm{m} / mathrm{sec}^{2} ).

NEET/Medical Exams
Physics
Solution 58 4.0 (1 ratings)  ( u=54 times frac{5}{18}=15 mathrm{m} / mathrm{s} )
( a=-0.3 mathrm{m} / mathrm{s}^{2} )
( therefore quad v=u+a t )
( 0=15-0.3 mathrm{t}_{0} )
( t_{0}=frac{15}{0.3}=50 mathrm{sec} )
After 50 second, locomotive comes in rest permanently. ( therefore quad v^{2}=u^{2}+2 a s )
[
begin{array}{l}
mathrm{O}^{2}=15^{2}-2 times 0.3 mathrm{S}_{0}
mathrm{S}_{0}=frac{225}{0.6}=frac{2250}{6}=375 mathrm{m}
end{array}
]
the distance of the locomotive from traffic light ( =400-375=25 cdot mathrm{metre} ) Quick and Stepwise Solutions Just click and Send OVER 20 LAKH QUESTIONS ANSWERED Download App for Free