A train goes in to a tunnel at the 20m/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=20m/s
v=55m/s
s=1500m
a=?
t=?
______
v²-u²=2as
→(55)²-(20)²=2*1500*a
→2625=3000a
→a=2625/3000
→ a=0.875m/s²
acceleration = 0.875m/s²
______
v=u+at
→55=20+0.875t
→55-20=0.875t
→35=0.875t
→t=35/0.875
→t=40s
time = 40seconds
@:-)
u=20m/s
v=55m/s
s=1500m
a=?
t=?
______
v²-u²=2as
→(55)²-(20)²=2*1500*a
→2625=3000a
→a=2625/3000
→ a=0.875m/s²
acceleration = 0.875m/s²
______
v=u+at
→55=20+0.875t
→55-20=0.875t
→35=0.875t
→t=35/0.875
→t=40s
time = 40seconds
@:-)
jesuschrist:
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0
v=55m/s
u=20m/s
s=1500
v²-u²=2as
(55)²-(20)² =2×1500×a
3025-400=3000a
2625/3000=a
a=8.75
u=20m/s
s=1500
v²-u²=2as
(55)²-(20)² =2×1500×a
3025-400=3000a
2625/3000=a
a=8.75
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