- #1
ElegantSir
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Homework Statement
"A 1480 kg car accelerates uniformly from a position of rest to a speed of 95km/h in 6 s?"
1) calculate the cars acceleration
2) determine how far the car traveled during this acceleration
3) determine how much work was done by the car during the 6s
4) identify what power was developed during this process
Homework Equations
v2 = v1 + at
d = v1t + 1/2at²
d = v2 - 1/2at²
work = force / distance or w = f / d
power = work / time or p = w / t
f = m * g
The Attempt at a Solution
1) I rearranged v2 = v1 + at to a = v2 - v1 / t to find power
so
95km/h - 0km/h / 6s = 95km/h / 6s = 15.83m/s²
Therefore the acceleration of the car should be 15.83m/s²
2) This is where I am stuck.
I would assume I need to use the equation d = v1t + 1/2at²
so
d = 0 * 6 + 1/2 * 15.83 * (6)²
from this i get 284.94m[/B]
I usually check online for the answers after I am done my work but none of the online sources I am finding match my answers for question 2. The answer I am finding online is 79.167. Would anybody be able to tell me if both of the answers for question 1 and 2 are correct?
Any help is appreciated!