Finding the velocity at the top of a loop (HELP)

Hey Guys.

I’ve been spending the last 1½ week trying to figure this out on my own, but I just can’t find the answer.

A car (toy car) weights at about 0,062 Kg, and enters the loop at the speed of 0,60 m/s. The radius of the loop is 0,2011 m.

Find the speed at the top of the loop (Not the average speed, but the speed of the toy car once it gets to the top)

I have made my own speculations as to howto solve it:

KE_start + PE_start = KE_top +PE_top

1/2 mv^2+mgh=1/2 mv^2+mgh

1/2*0,062 kg*〖0,60821〗^2 m/s +0,062 kg*9,82 m/s^2 *0=1/2 0,062kg*v_top^2+0,062 kg*9,82 m/s^2 *0,2011 m

Would love to get the answer to this 🙂

http://ift.tt/1kKunBx

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