A train goes in to a tunnel at 20 m/sec and emerges it at 55m/sec the tunnel is 1500m long find how long the train in the tunnel and acceleration of the train?
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u = 20 m/s
v= 55 m/s
s= 1500 m
v²-u² = 2as
a = v²-u² / 2s
a =(55)² - (20)² / 2 x 1500
a= (3025 ) - 400 / 2 x1500
a= 2625 / 3000
a= 0.875 m/s²
t = v-u /a
t = 35/ 0.875
t = 40 sec
v= 55 m/s
s= 1500 m
v²-u² = 2as
a = v²-u² / 2s
a =(55)² - (20)² / 2 x 1500
a= (3025 ) - 400 / 2 x1500
a= 2625 / 3000
a= 0.875 m/s²
t = v-u /a
t = 35/ 0.875
t = 40 sec
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