# physics

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1.A cylinder rolls without slipping on a horizontal plane and then up an incline. The linear speed of the cylinder at the beginning is v. What maximal height h will the cylinder reach?

2.Helicopter of mass M holds stationary in the air fires a missile of mass m<< M with a speed v. Find the recoil speed of the helicopter.

• physics -

0= Mv + mu
Mv/m = Mu/m
U= -Mv/m

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