What is the average acceleration of a car

  • Thread starter espo
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  • #1
espo
what is the average acceleration of a car that goes from rest to 59 km h in 9.0 seconds?
 
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  • #2
Integral
Staff Emeritus
Science Advisor
Gold Member
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acceleration is definined to be change in velocity per unit time.

What is your change in velocity?

What is your change in time?

Can you take it from there?
 
  • #3
279
1
First convert 59 Km/h into m/s:

59 * 1000 / 3600 (seconds in an hour) (m in a Km)

59 / 3.6 = 16.4 m/s

Then use the constant acceleration formula:

v = u + at
16.4 = 0 + a*9.0
a = 16.4/9.0
a = 1.82 m/s2
 
  • #4
russ_watters
Mentor
19,791
6,192
Generally, lavalamp, we lead them in the right direction and then let them figure it out from there. Thats the way their teachers would want it.
 
  • #5
279
1
Oops, I'll try and remember that in future. :frown:
 

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