Question

You are outside in a big, level, field, in the midst of which stands a narrow wall, 49.6 m high. You are a given a device that can launch a projectile, always with the same speed of 93.0 m/s.

a. First, you launch a projectile from the top of the wall, at an angle of 25.2 degrees above the horizontal. How far from the base of the wall does the projectile land on the ground?

Next, you launch another projectile from the top of the wall. After 17.30 seconds of flight, the projectile lands on the ground.

b. At what angle above the horizontal was the projectile launched this time?

c. How far from the base of the wall does the projectile land in this case?

Now you position the launcher on the ground, a distance of 158.70 m from the base of the wall. You launch the projectile directly toward the wall, at an angle of 13.9 degrees above the horizontal. d. How high above the ground does the projectile strike the wall? e. Still positioned at the same distance, 158.7 m from the base of the wall, what is the minimum launch angle with respect to the horizontal that will allow the projectile to just make it over the top of the wall?

Please answer only questions D and E. Thank you.

Answer 1