5. A race car travelling with an initial velocity of 90 km/h accelerates at a uniform rate of 5.0 m/s 2 for 2.0 s. What is the
final velocity of the race car in m/s?
Given
Unknown
Formula
Solution
Answer
final velocity of the race car in m/s?
Given
Unknown
Formula
Solution
Answer
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Answer:
35 m/s
Explanation:
given
vi = 90 km/h conv. to meters per second
= 90km/h x 1000meters/3600seconds
vi = 25 m/s
a = 5m/s^2
t= 2 seconds
unknown
final velocity = vf
formula
a=(vf-vi)/t
solution
to find vf derived the formula
a=(vf-vi)/t
t a = vf-vi
vf = at + vi
vf = (5m/s^2)(2s) + 25m/s
vf= 35 m/s