At a ride in an amusement part a cart, with a mass of 150 kg, rolls down a long curved hill. The height of the hill is 50 m and the length of the track that the cart follows is 300 m. As the cart rolls down the hill, it experiences both a rolling frictional force and air resistance. The net effect of these two resistive forces over the run is equivalent to a constant force of 70 N, which is opposite to the cart's velocity.(adsbygoogle = window.adsbygoogle || []).push({});

(A) If the cart starts out at rest at the top of the hill, what is the speed at the bottom?

(B) There is a large hydraulic piston at the bottom of the hill thate engages the cart and brings it to rest by applying a force for 5.0 m. Neglecting all other resitive forces, what is the magnitude of the force needed to stop the cart?

RELEVENT EQUATIONS

(Uf - Ui) + (Kf - Ki) = -Fd

ATTEMPT AT THE SOLUTION

I found (A) to be 26.4 m/s, but I have no idea on where to start on part (B)

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# Homework Help: Hydraulic Piston on te bottom of a hill

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