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T1a3p - shown on the 3.0-kg block Determine(a the...

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Assignment 3 Problems(Fall Term Physics 102) 29. A brick is thrown upward from the top of a building at an angle of 25° to the horizontal and with an initial speed of 15 m/s. If the brick is in flight for 3.0 s, how tall is the building? H=25 m 55. A home run is hit in such a way that the baseball just clears a wall 21 m high, located 130 m from home plate. The ball is hit at an angle of 35° to the horizontal, and air resistance is negligible. Find (a) the initial speed of the ball, (b) the time it takes the ball to reach the wall, and (c) the velocity components and the speed of the ball when it reaches the wall. (Assume the ball is hit at a height of 1.0 m above the ground.) V i = 42 m/s, T=3.8 s, V x V=34 m/s, V y = -13 m/s, V= 37 m/s 17. A 150-N bird feeder is supported by three cables as shown in Figure P4.17. Find the tension in each cable. F IGURE P4.17 T 1 =75 N, T 2 =130 N 27. Assume that the three blocks in Figure P4.27 move on a frictionless surface and that a 42-N force acts as
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Unformatted text preview: shown on the 3.0-kg block. Determine (a) the acceleration given this system, (b) the tension in the cord connecting the 3.0-kg and the 1.0-kg blocks, and (c) the force exerted by the 1.0-kg block on the 2.0-kg block. FIGURE P4.27 a =7 m/s 2 , T = 21 N, F = 14 N to the right 30. An object with mass m 1 = 5.00 kg, resting on a frictionless horizontal table, is connected to a cable that passes over a pulley and then is fastened to a hanging object with mass m 2 = 10.0 kg, as in Figure P4.30. Find the acceleration of each object and the tension in the cable. FIGURE P4.30 a =6.53 m/s 2 , T = 32.7 N 29. A 40.0-kg wagon is towed up a hill inclined at 18.5° with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 140 N in it. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. How fast is the wagon going after moving 80.0 m up the hill? V= 7.9 m/s...
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