A tram car enters a long tunnel of length of 8.64 km. If the ratio of the velocities of tram at the entrance and exit are in the ratio of 5:1 then find the velocities of the tram at the entrance and the exit if it takes 20/3 min to travel from entrance to exit. (Assume the tram moves with uniform retardation)
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u
20 min
20 vi
8.64 km.
I he = utax ģ= G= -4
v² =u² + 2as
3 u² = 4² - 724 8 =) 244 = 125 25 255
u = 158 = 15x8.64 km/hr
2) 15 X 8-64 x $ 5 ms
=)
36 ms
= 7.2 ms
18
3x60
a = 3600
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