V^2=Ae^-2kx - g/k (upward motion)
V^2=g/k - Be^2kx (downward motion)
Use the above result to show that , when the bullet hits the ground on its return, the speed will be equal to the expression
Vo Vt / (Vo^2 + Vt^2)^0.5
In which Vo is the initial upward speed and Vt= (mg/C2)^0.5=...
Homework Statement
4. Prove that
Prove thatd d/dt[ r · ( v × a ) ] = r · ( v × a ̇ )
Homework Equations
The Attempt at a Solution
I do know how can I start. i feel confuse! please help me