A man throws a rock from the top of a cliff that is 55.0 m aboveground level with an initial speed of 20.0 m/s at an angle of 38.0°above the horizontal.
(a) Determine the time it takes for the rock to hit the groundbelow the cliff.
s
(b) Determine the horiztonal distance that the rock travels.
km
(c) At the instant just before the rock hits the ground below thecliff, find the horizontal and the vertical components of itsvelocity. (Take up and to the right as positive directions.)
horizontal m/s
vertical m/s
(d) What is the the magnitude of the velocity of the rock justbefore it hits the ground?
m/s
(e) What is the angle made by the velocity vector of the rock justbefore it hits the ground?
° (below the horizontal)
(f) Find the maximum height above the cliff top reached by therock.
m
A man throws a rock from the top of a cliff that is 55.0 m aboveground level with an initial speed of 20.0 m/s at an angle of 38.0°above the horizontal.
(a) Determine the time it takes for the rock to hit the groundbelow the cliff.
s
(b) Determine the horiztonal distance that the rock travels.
km
(c) At the instant just before the rock hits the ground below thecliff, find the horizontal and the vertical components of itsvelocity. (Take up and to the right as positive directions.)
horizontal m/s
vertical m/s
(d) What is the the magnitude of the velocity of the rock justbefore it hits the ground?
m/s
(e) What is the angle made by the velocity vector of the rock justbefore it hits the ground?
° (below the horizontal)
(f) Find the maximum height above the cliff top reached by therock.
m
