A train is moving with a velocity of 90km/hIt is brought to stop by ap

1.	A train is moving with a velocity of 90km/hIt is brought to stop by applying the brakeswhich produce a retardation of 0.5 m/sFind:1) velocity after 30s, and2)the time taken by thetrain to come to rest.
Answer» Answer: Equation to be applied " v = U - a×t ", v is final velocity, u is initial velocity, a is retardation and t is time. Velocity at the time of applying break = 90 km/h = 90 km/h × (5/18) = 25 m/s (1) velocity after 30 s :- v = 25-(1/2)×30 = 19 m/s (2) time to come to rest :- 0 = 25-(1/2)×t , SOLVING for t , we get t = 50 s

A train is moving with a velocity of 90km/hIt is brought to stop by applying the brakeswhich produce a retardation of 0.5 m/sFind:1) velocity after 30s, and2)the time taken by thetrain to come to rest.

Answer»

Answer:

Equation to be applied " v = U - a×t ", v is final velocity, u is initial velocity, a is retardation and t is time.

Velocity at the time of applying break = 90 km/h = 90 km/h × (5/18) = 25 m/s

(1) velocity after 30 s :- v = 25-(1/2)×30 = 19 m/s

(2) time to come to rest :- 0 = 25-(1/2)×t , SOLVING for t , we get t = 50 s