Question

6Q.A train moving with a velocity of 20 m s' is brought
to rest by applying brakes in 5 s. Calculate the
retardation
Ans. 4 m s-
Q.7A train travels with a speed of 60 km h-' from
station A to station B and then comes back with a
speed 80 km h-' from station B to station A. Find :
(1) the average speed, and (ii) the average velocity
of train.
Ans. (i) 68.57 km h-!, (ii) zero
yelocity of 90 km h-. It is​

Answer 1

Answer:

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