Question

A truck running at 90km/hr slow down to 54km/hr over a distance of 20m. calculate the retardation produced by its brakes​

Answer 1

Answer:

10m/s^2

Explanation:

• convert 90 km/hr and 54 km/hr into m/s.
• so it'll be 25 m/s and 15 m/s respectively
• then apply the values in the formula :-
• $v ^{2} = u {}^{2} - 2as$
• (- ) came because it is retardation