1.

What is the deceleration of a vehicle moving in a straight line that changes its velocity from 100 km/h to a dead stop in 10 sec?

Answer»

Change in velocity = 0 - 100 km/h. = -100 km/h

= -100 \(\times\,\frac{5}{18}=\frac{-500}{18}m/sec.\)

Time =10 sec

Deceleration = \(\frac{{\frac{-500}{18}}}{10}=\frac{-500}{18}\,\times\,\frac{1}{10}=\frac{-50}{18}= \,-2.77\,m/sec^2\)


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