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If a bus travelling at 20 …

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If a bus travelling at 20 m/s is subjected to a study declaration of 5 m/s2, how long will it take to come to rest?

Posted by Ashmita Kaur 3 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 3 years, 9 months ago

For the bus,

Initial Velocity, u = 20 m/s
Final Velocity, v = 0 m/s
Acceleration, a = -5m/s² (minus sign because of deceleration)
Time, t = (?)

We know that,

a = (v - u)/t
∴t = (v - u)/a
∴t = (0 - 20)/(-5)
∴t = (-20)/(-5)
∴t = 4s

Thus, the bus will take 4 seconds to stop.

3Thank You

ANSWER

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CBSE > Class 09 > Science