AT&T; 30% 2- 5 points A book can slide down a frictionless hill at constant velo
ID: 2035912 • Letter: A
Question
AT&T; 30% 2- 5 points A book can slide down a frictionless hill at constant velocity a) True b) False 6.-10 points In the frictionless apparatus shown in Fig.4.37, m-20 kg. What is m2, if both masses are at rest? How about if both masses are moving at constant velocity? Show your work. 7- 10 points In the apparatus shown in Fig at right10 kg and the coefficients of static and kinetic friction between m and the table are 0.60 and 0.40, respectively. (a) What mass of mo will just barely set the system in motion? (b) Afler the sysiem begins to move, what is the acceleration? Show your work Multiple choice: 8-5 points A hiker throws a stone froem the upper edge of a vertical cliff. The stone initial speed is 25 m/sec directed at 40° with the face of the cliff as shown in figure at right. The stone hits the ground 3.75 sec afier being throwa and feels no appreciable air resistance as it falls. The height of the cliff is closest to; Sbow your work a) 71.8m b) 141 m c) 60.3 m d) 163 m e) 129 m 9-5 points Consider a 42.0 kg block of ice sliding down the 34.0° plane, as shown in Figure at right, Assuming the kinetice coefficient of friction is 0.060, what is the acceleration of the block down the incline? Show your work a) 6.56 m/sec b) 5 m/sec c) 9.74 m/sec d) 2.73 m/sec 10-10 peints Two weights are connected by a massless wire and pulled upward. The system is moving upward slowing down with m acceleration of 2 m/sec. The magnitude of the tension on the wire is T. In this situation a) TP b) T-P 25 N c) TExplanation / Answer
2.No,becuase on frictionless hill only one force that is gravity ,whose value is mg,so due to constant force means constant acceleration value of velocity will keep increasing.it cannot remain constant....