The initial velocity of a train which is stopped in 20 s by applying brakes (retardation due to brakes being 1.5 ms-2) is _______ .
A. 30 ms-1
B. 30 cm-1
C. 20 cm-1
D. 24 ms-1.
Answer:A
The initial velocity of a train which is stopped in 20 s by applying brakes (retardation due to brakes being 1.5 ms-2) is _______ .
A. 30 ms-1 B. 30 cm-1 C. 20 cm-1 D. 24 ms-1.