Question

Sketch the free-body diagram of a baseball (a) at the moment it is hit by the bat. and again (b) after it has left the bat and is flying toward the outfield. Ignore air resistance. Arlene is to walk across a "high wire" strung horizontally between two buildings 10.0 m apart. The sag in the rope when she is at the midpoint is 10.0". as shown in Fig. 4-47. If her mass is 50.0 kg. what is the tension in the rope at this point? A window washer pulls herself upward using the bucket-pulley apparatus shown in Fig. 4-48. (a) How hard must she pull downward to raise herself slowly at constant speed? (b) If she increases this force by 15%. what will her acceleration be? The mass of the person plus the bucket is 72 kg. A train locomotive is pulling two cars of the same mass behind it. Fig. 4-51 Determine the ratio of the tension in the coupling (think of it as a cord) between the locomotive and the first car (F_T1). to that between the first car and the second car (F_T2), for any nonzero acceleration of the train. The two forces F_1 rightarrow, and F_2 rightarrow shown in Fig. 4-52a and b (looking down) act on an 18.5-kg object on a frictionless tabletop. If F_1 = 102 N and F_2 = 16.0 N. find the net force on the object and its acceleration for (a) and (b).
23, 24, 28

Answer 1

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クー SMTW 13 14 15 16 20 21 22 23 27 28 29 30