A stone is thrown at an angle of 30 above the horizontal from the top edge of a cliff with an initial speed of 14 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 7.1 s. What is the height of the cliff? Note: g = 9.8 m/s2 and air resistance is negligible.
a. 58 m
c. 120 m
b. 114 m
d. 197 m
Question 2
A ball is rolled horizontally off a table with an initial speed of 0.18 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s. How far away from the table does the ball land? Note: g = 9.8 m/s2 and air resistance is negligible.
a. 0.054 m
c. 1.2 m
b. 0.072 m
d. 1.9 m
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