- #1
Alex.malh
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Homework Statement
There is a wagon (W) on wheels with a vertical pole of 2m. (mass 20kg)
On the top of that pole there is a rope pendulum with an attached mass (M) of 10kg and length 1m.
The starting position is a pendulum angle of 60°.
No friction taken into account.
What is the speed of the mass compared to the wagon the first time it passes the pole?
Homework Equations
Ep= m * g * h
Ek= m*v²/2
The Attempt at a Solution
1.
EM0= 10kg * 10 m/s² * (1m *cos60) = 50J
EW0= 0
2.
EM1= 10kg*VM²/2
EW1= (10kg+20kg) *VW²/2
50J=EM1+EW1
And now i don't know how to continue.