SOLUTION: jA car accelerated from 25 km/hr to 55 km/hr in 30 seconds. What is its acceleration?

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Question 1197727: jA car accelerated from 25 km/hr to 55 km/hr in 30 seconds. What is its acceleration?
Found 3 solutions by ikleyn, MathLover1, Alan3354:
Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.
A car accelerated from 25 km/hr to 55 km/hr in 30 seconds. What is its acceleration?
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By the definition, an acceleration is the change of speed related to the change of time

    a =  = 30*120 = 3600 km/hr^2.


Here 1/120 represents 30 seconds, that comprise  1/120 of an hour.

Solved.



Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!



the acceleration of the body is given by:

where is the time taken to change the velocity to final velocity .
given:



The initial velocity in :

The final velocity in :


Plugging in all given values, we have





Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
jA car accelerated from 25 km/hr to 55 km/hr in 30 seconds. What is its acceleration?
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It's (55 - 25)/30 km/hr per second.
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If you want to spec units, then say that.
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