A bedroom bureau with a mass of 47 kg,including drawers and clothing, rests on t
ID: 1724445 • Letter: A
Question
A bedroom bureau with a mass of 47 kg,including drawers and clothing, rests on the floor. (a) If the coefficient of static frictionbetween the bureau and the floor is 0.45, what is the minimumhorizontal force a person must apply to start the bureaumoving?______ N(b) If the drawers and clothing, with 19kg mass, are removed before the bureau is pushed, what is the newminimum magnitude?________ N (a) If the coefficient of static frictionbetween the bureau and the floor is 0.45, what is the minimumhorizontal force a person must apply to start the bureaumoving?______ N
(b) If the drawers and clothing, with 19kg mass, are removed before the bureau is pushed, what is the newminimum magnitude?________ N
Explanation / Answer
(a) Mass, M = 47 kg Coefficient of static friction, =0.45 Minimum horizontal force required = Staticfriction = N = M g = 0.45 *47 * 9.8 = 207.27 N (b) Mass, M = 47 - 19 = 28 kg Coefficient of static friction, =0.45 Minimum horizontal force required = Staticfriction = N = M g = 0.45 *28 * 9.8 = 123.48 N
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