AP Physics C Fall Final Web Review

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Name: ______________________ ID: A ____ 18. A stone is thrown at an angle of 30° above the horizontal from the top edge of a cliff with an initial speed of 12 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 5.6 s. What is the height of the cliff? (g = 9.8 m/s 2 and air resistance is negligible) a. 58 m b. 154 m c. 120 m d. 197 m e. 213 m ____ 19. A stone is thrown at an angle of 30° above the horizontal from the top edge of a cliff with an initial speed of 12 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 5.6 s. How far out from the cliff's edge does the stone travel horizontally? (g = 9.8 m/s 2 and air resistance is negligible) a. 58 m b. 154 m c. 120 m d. 175 m e. 197 m ____ 20. Two ropes are attached to a 40-kg object. The first rope applies a force of 25 N and the second, 40 N. If the two ropes are perpendicular to each other, what is the resultant acceleration of the object? a. 1.2 m/s 2 b. 3.0 m/s 2 c. 5.0 m/ s 2 d. 25 m/s 2 e. 47 m/s 2 ____ 21. The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 20-kg object at 6.0 m/s 2 on the moon? a. 1.3 N b. 20 N c. 33 N d. 120 N e. 130 N ____ 22. A 2 000-kg sailboat experiences an eastward force of 3 000 N by the ocean tide and a wind force against its sails with magnitude of 6 000 N directed toward the northwest (45° N of W). What is the direction of the resultant acceleration? a. 60° N of E b. 30° N of W c. 30° N of E d. 74° N of W e. 60° N of W ____ 23. Rita accelerates a 0.40-kg ball from rest to 9.0 m/s during the 0.15 s in which her foot is in contact with the ball. What average force does she apply to the ball during the kick? a. 48 N b. 72 N c. 24 N d. 60 N e. 76 N 4
Name: ______________________ ID: A ____ 24. A 10-kg mass and a 2.0-kg mass are connected by a light string over a massless, frictionless pulley. If g = 9.8 m/s 2 , what is the acceleration of the system when released? a. 2.5 m/s 2 b. 6.5 m/s 2 c. 7.8 m/s 2 d. 9.8 m/s 2 e. 9.9 m/s 2 ____ 25. A 15-kg block rests on a level frictionless surface and is attached by a light string to a 5.0-kg hanging mass where the string passes over a massless frictionless pulley. If g = 9.8 m/s 2 , what is the tension in the connecting string? a. 65 N b. 17 N c. 49 N d. 37 N e. 26 N ____ 26. An elevator weighing 20 000 N is supported by a steel cable. What is the tension in the cable when the elevator is being accelerated upward at a rate of 3.00 m/s 2 ? (g = 9.80 m/s 2 ) a. 13 900 N b. 23 100 N c. 20 000 N d. 26 100 N e. 17.800 N ____ 27. As a 3.0-kg bucket is being lowered into a 10-m-deep well, starting from the top, the tension in the rope is 9.8 N. The acceleration of the bucket will be: a. 6.5 m/s 2 downward. b. 9.8 m/s 2 downward. c. zero. d. 3.3 m/s 2 upward. e. 5.6 m/s 2 upward. ____ 28. A worker pushes a wheelbarrow with a force of 40 N over a level distance of 6.0 m. If a frictional force of 24 N acts on the wheelbarrow in a direction opposite to that of the worker, what net work is done on the wheelbarrow? a. 240 J b. 216 J c. 144 J d. 96 J e. 75 J ____ 29. I use a rope 2.00 m long to swing a 10.0-kg weight around my head. The tension in the rope is 20.0 N. In half a revolution how much work is done by the rope on the weight? a. 40.0 J b. 126 J c. 251 J d. 0 e. None of the above. 5
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AP Physics C Fall Final Web Review

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