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tb.MSU
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A pumpkin of mass 5kg is shot out of an air cannon at an elevation angle of 45 degrees with an initial velocity of 54m/s. It lands 142 m away. Assuming the force due to air resistance was F=-kmv, find the value of k.
I need some help with this problem. I'm not quite sure how to put in the angle. All i really know is:
F = ma = m(dv/dt) = -kmv ... after integration
ln v = -kt + C1 v(t=0)=Vo C1 = ln Vo
thus:
v = Vo(e^-kt)
i know this is completely off though because no where is there a sin or cos for me to input the angle..
any help would be much appreciated thanks!
ps. I'm a second year student at Michigan State. Astrophysics major.. gone through Calc 4.
tb
I need some help with this problem. I'm not quite sure how to put in the angle. All i really know is:
F = ma = m(dv/dt) = -kmv ... after integration
ln v = -kt + C1 v(t=0)=Vo C1 = ln Vo
thus:
v = Vo(e^-kt)
i know this is completely off though because no where is there a sin or cos for me to input the angle..
any help would be much appreciated thanks!
ps. I'm a second year student at Michigan State. Astrophysics major.. gone through Calc 4.
tb