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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 7

A bus can accelerate with an acceleration of 1 m/s2 . Find the minimum time for the bus to attain the speed of 100 km/s from 50 km /s.

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Question

A bus can accelerate with an acceleration of 1 m/s2 . Find the minimum time for the bus to attain the speed of 100 km/s from 50 km /s.

Short/Brief Note
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Solution

Acceleration of the bus (a) = 1 m/s2
Initial velocity (u) = 50 km/s = 50 x 103 m/s
Final velocity (v) = 100 km/s = 100 x 103 m/s
time (t) = ?

`"t "= ("v"-"u") /"t"= (100xx10^3 - 50xx10^3)/1 = ((100-50)xx10^3)/1`

t = 50 × 103 s

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Chapter 2: Force and Motion - Evaluation [Page 26]

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Samacheer Kalvi Science - Term 1 [English] Class 7 TN Board
Chapter 2 Force and Motion
Evaluation | Q VIII. 3. | Page 26

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