Question

A car moving with a speed of 40 km/h can be
stopped by applying brakes at least after 2 m. If
the same car is moving with a speed of 80 km/h,
what is the minimum stopping distance?
(a) 8 m (b) 6 m
(c) 4 m (d) 2 m

Answer 1

Answer:

4m.

Explanation:

In 40km/h speed it stops at a distance of 0.002km

In 1km/h speed it stops at a distance of 0.002km/40km/h

In 80km/h speed it stops at a distance of 0.002km/40km/h×80km/h = 0.004 km

0.004 km = 4m

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Answer 2

Answer:8

Explanation:

use equation v2=u2-2aS