17 POINTS AND A BRAINLIEST PLEASE HELP!!!!!!!!!!!!!
1 answer:
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Answer:
u = 29.22 m/s
Explanation:
distance (s) = 58.52 m
coefficient of kinetic friction (k) = 0.75
final velocity (v) = 0 m/s
acceleration due to gravity (g) = 9.8 m/s^{2}
How fast was she driving (u)
we can get how fast she was driving by using the formula below
s = ut - ...equation 1
where
- s = distance
- u = her initial velocity
- a = acceleration =
- k = coefficient of kinetic friction
- g = acceleration due to gravity
- t = time
from v = u - at (recall that v = 0)
0 = u - at, therefore t = u/a = u/kg
now substituting the required values above into equation 1 we have
s =
s =
u =
u =
u = 29.22 m/s