Question

A bus is moving with a constant speed of 75 kmph. The driver observes the red signal and applies the brakes. If the speed of the bus reduces uniformly to 21 kmph in 3s find the retardation produced in the bus. A) 3m/s2 B) 4m/s2

C) 5m/s2

D) 6m/s2​​

Answer 1

Answer:

5m/S2 is your answer

Explanation:

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Answer 2

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Answer:

we know the velocity time relation formula

V = U + AT

here,

V = 21

U = 75

A = ?

T = 3

now we need to find the value of A that is retardation of the bus

21 = 75+A(3)

-54 = 3A

-18 = A

the value of acceleration is three times the retardation so

the value of retardation equal to -18/3 = -6

hence, the answer for this question is 6m/s^2 because the value of the retardation will be in the opposite sign

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