You throw a pebble upward as shown, with a velocity vo at an angle ?, from a roof (at point J) Figure 3-6
If the pebble rises upward to h ft above the roof (to point K) , then falls to the ground below (to point L) , its speed when it hits the ground is
A) between vo and 2vo
B) greater than 2 vo
C) vo
D) 2 vo
E) vo
Correct Answer:
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