1. what is the acceleration of the car that starts from rest and accelerates uniformly over a time of 14.17 s for a distance of 110 m?
2. an object is thrown straight down from the top of the building at the speed of 67.1 m/s. It hits the ground with a speed of 98.3 m/s.
a)How high is the building?
b)How long was the object in the air?
Answers
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Answer:
12.10 m s−2.
a)61.22 m
b)2.04 sec
Explanation:
a) v^2 - u^2 = 2*a*h
40^2 - 20^2 = 2*9.8 * h
1200/2* 9.8 = h
h = 61.22 m
b) v = u +a*t
t = (40-20)/9.8
t=2.04 sec.
Explanation:
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