Question

A train starts from rest and travels for 5.0 s with a uniform acceleration of 1.5 m/s2. What is the final velocity of the train?

Answer 1

We know v=u +at
Here u = 0
a= 1.5 units
t= 5 s
So v= 5×1.5 m/s = 7.5 m/s

Answer 2

Answer:

Final speed of the train, v = 7.5 m/s

Explanation:

Given that,

Initial speed of the train, u = 0

Acceleration of the train, $a=1.5\ m/s^2$

Time, t = 5 s

We need to find the final speed of the train. Let is it equal to v. It can be calculated using first equation of motion as :

v = u + a × t

$v=0+1.5\times 5$

v = 7.5 m/s

So, the final velocity of the train is 7.5 m/s. Hence, this is the required solution.