Question

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 10s?
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Answer 1

Answer:

amswer will be -10

Explanation:

because ,

a= change in velocity/time

but here were are talking about redardation or deceleration, it is same of aceleration but answer comes always in -

so d=-100/10 i.e.,-10 answer

Answer 2

Answer:

10m/s^2

Explanation:

As we know:

deceleration =finally velocity- initial velocity/time

And in the above statement:

final velocity =0

initial velocity =100

time taken =10s

so,

deceleration =0-100/10=_100/10=_10

deceleration =_10m/s^2

Hope it helps