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A rock is thrown from on a cliff with the velocity of 15 m/s at an angle of 30 degrees. it takes the rock 6.30 seconds to hit t...Asked by Jay Kay
A rock is thrown from on a cliff with the velocity of 15 m/s at an angle of 30 degrees. it takes the rock 6.30 seconds to hit the ground. how high was the cliff?
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Answered by
bobpursley
hfinal=hinitial+Vi*t-4.9t^2
you have hfinal=0, t, Vi=15sin30, solve for hinitial
you have hfinal=0, t, Vi=15sin30, solve for hinitial
Answered by
Jay Kay
Where does the 4.9 come from though?
Answered by
bobpursley
1/2 g= 4.9
Answered by
Jay Kay
Oh, is it .5 multiplied by the acceleration of gravity?
Answered by
bobpursley
yes.
Answered by
Jay Kay
Alright. Thank you so much for your help!
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