A train approaching a crossing changes speed from 25 m/s to 10 m/s in 240 s. How can the train’s acceleration be described?
A. The train’s acceleration is positive.
B. The train is not accelerating.
C. The train will come to rest in 6 minutes.
D. The train’s acceleration is negative.
The train's is deccelarating in other words it is slowing down . it can be proven through the equation a = v - u /t
= -15 / 240 = - 1 /16 ms^-2
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