1.

A bus decreases its speed from 80 km h–1 to 60 km h–1 in 5 s. Find the acceleration of the bus. Please answer the question I want to verify.

Answer»

Explanation:Solution,Here, we haveInitial velocity, U = 80 km/h = 80 × 5/18 = 22.2 m/sFinal velocity, v = 60 km/h = 80 × 5/18 = 16.6 m/s.Time taken, t = 5 secondsTo Find,Acceleration, a = ???According to the 1st EQUATION of motion,We KNOW that,v = u + ATSO, putting all the values, we getv = u + at⇒ 16.6 = 22.2 + a × 5⇒ 16.6 - 22.2 = 5a⇒  - 5.6 = 5a⇒ - 5.6/5 = a⇒ a = - 1.12 m/s²Hence, the acceleration of the bus is - 1.12 m/s².



Discussion

No Comment Found

Related InterviewSolutions