Procedure 2: Place a 250 g mass into the felt bottomed cart on the level track.

Question

Procedure 2: Place a 250 g mass into the felt bottomed cart on the level track. Hook a string on the end of the cart, pass it over the pulley, and hang the mass-holder (mass 50g) on the other end. Slowly add small slotted masses to the mass-holder until the cart begins to slide.

Refer to procedure 2. Assume the mass of the cart is m, and the mass hanging on the end of the string is M.

Suppose m = 3365 g and M = 483 g, and the cart accelerates at 0.429 m/s2. Find ?k, the coefficient of kinetic friction between the cart and the track.

Explanation / Answer

(0.483+0.05)*9.8 - T = (0.483+0.05)*a T - u*(3.365+0.25)*9.8= (3.365+0.25)*a as a = 0.429 so, u = 0.097

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