Question

Two runners start at the same point on a straight track. The first runs with constant acceleration so that he covers 109 yards in 9 seconds. The second runner waits 3 seconds and then throws a rock at his opponent's head. If the head and the rock are at the same level form the ground, what must the initial magnitude of the velocity be if the rock is to hit the head just at the 109 yard tape? Give the answer in feet per second

A gun shoots a bullet with a velocity of magnitude 446 m/s. The goal is to hit the target 1,615 meters away. How high above the target must you aim to correct for gravity? (Assume the gun and target are at the same eight)

Answer 1

a gun shoots a bullet.....

time taken by bullet to reach the horizontal distance

x = v t

1615 = 446 * t

t = 3.621 s

motion along vertical

h = 0.5 gt^2

h = 4.9* 3.621^2

h = 64.25 m

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plz post other problem separately

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