Question

45.
If a car at rest accelerates uniformly to a speed of
144 km/h in 20 seconds, it covers a distance of:
(1) 20 m
(2) 400 m
(3) 1440 m
(4) 2980 m​

Answer 1

Answer:

400m

Explanation:

first convert the final velocity in m/s. As the initial velocity is 0 and time is 20sec, calculate the acceleration. The acceleration is 2.

Now using 2nd or 3rd equation of motion, the distance must be 400m