A refrigerator of mass 100kg has coefficients of friction with the floor of mu z

Question

A refrigerator of mass 100kg has coefficients of friction with the floor of mu z = 0.60 and mu k = 0.40. A workman pushes the refrigerator with a horizontal force Fw in three different cases. Case 1: fw = 300N Case 2: Fw = 500N Case 3 Fw = 700N. Rank the three cases in order of greatest frictional force to least frictional force created between the refrigerator and floor. Use g = 10m/s2. Case 1 > Case 2 > Case 3 Case 3 > Case 2 > Case 1 Case 2 > Case 3 > Case 1 Case 1 > Case 3 > Case 2 All cases generate an equal force of friction A block of mass m is lowered along a 30 degree incline at constant speed by gradually letting out a length of rope as shown. The block incline interface has a coefficient of a kinetic friction mu k = 0.25 What is the tension in the rope? Use g = 10 m/s/s. 0 50mg 0.35mg 0.28mg 0.19mg This type of motion is not possible with this coefficient. A car of mass M travels in a straight line at constant speed on a level road with a coefficient friction mu and a drag force D. the magnitude of the net force on the car is: mu Mg (mu Mg)(D) mu Mg/D Zero A horizontal amusement park ride. when spinning at a constant rate, makes 20 revolve minute. What is the Period of the uniform circular motion? 0.005s 0.333s 3.0s 40s The radius needs to be given in order to determine the Period

Explanation / Answer

1-E 2-C 3-C 4-E 5-B

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