Four vehicles approach an intersection with a 4 way stop at the same time. Car B is ahead of Car A and both are in the same lane
1 answer:
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Answer:
d = 19.796m
Explanation:
Since the ball is in the air for 4.02 seconds, the ball should reach the maximum point from the ground in half the total time, therefore, t=2.01s to reach maximum height. At the maximum height, the velocity in the y-direction is 0.
So we know t=2.01, vi=0, g=a=9.8m/s and we are solving for d.
Next, you look for a kinematic equation that has these parameters and the one you should choose is:
Now by substituting values in, we get
d = 19.796m
Answer:
4.69 s
Explanation:
u = Initial velocity = 30 m/s
= Angle of launch =
g = Acceleration due to gravity =
Time taken by the projectile to land is given by
The time the projectile is in the air before it contacts the ground again is 4.69 s.