Asked by cheerie
im a bit puzzled, please help me gain the sanity required for this confusion...
suppose a ball is thrown from the top of a cliff, and i am supposed to get its final velocity; since when the ball reaches it maximum height, the vf which becomes the vi or initial velocity upon its fall on earth is o, should i conclude that the vix or the velocity in the horizonal component is 0? Or should i use the fact:
vix=vfx
thanks.
suppose a ball is thrown from the top of a cliff, and i am supposed to get its final velocity; since when the ball reaches it maximum height, the vf which becomes the vi or initial velocity upon its fall on earth is o, should i conclude that the vix or the velocity in the horizonal component is 0? Or should i use the fact:
vix=vfx
thanks.
Answers
Answered by
drwls
The final velocity, just before it hits the ground at the bottom of the cliff, is such that the kinetic energy will have increased by M g H.
Thus
Vfinal^2 - Vinitial^2 = 2 g H
The direction that the ball is thrown makes no difference.
Thus
Vfinal^2 - Vinitial^2 = 2 g H
The direction that the ball is thrown makes no difference.
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