Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 6, Problem 54SP
Considering the skier in the previous problem, suppose she starts down the slope moving at 10.0 m/s. If she loses 1200 J to friction, how fast will she be moving at the bottom of the hill? Should your answer be more or less than the answer to the previous problem? [Hint: Remember that
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Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 6 - 24. A force of 3.0 N acts through a distance of 12...Ch. 6 - 25. A box is pulled across a level floor a...Ch. 6 - 26. An automobile is pushed 10.0 ft by a woman...Ch. 6 - 27. A steady force of 500 N is applied...Ch. 6 - 28. Suppose that a 100-kg crate is to be raised...Ch. 6 - 29. A 10.0-kg flowerpot falls off a windowsill...Ch. 6 - 30. How much work in total must a 200-lb man do...Ch. 6 - 31. A 4.0-kg object is lifted 1.5 m. (a) How much...Ch. 6 - 32. A uniform rectangular marble slab is 3.4 m...Ch. 6 - 33. How large a force is required to accelerate a...
Ch. 6 - 34. A 1200-kg car going 30 m/s applies its brakes...Ch. 6 - 35. A proton (m = 1.67 × 10−27 kg) that has a...Ch. 6 - 36. A 200-kg cart is pushed slowly at a constant...Ch. 6 - 6.37 [II] Repeat Problem 6.36 if the distance...Ch. 6 - 38. A 50 000-kg freight car is pulled 800 m up...Ch. 6 - 39. A 60-kg woman walks up a flight of stairs that...Ch. 6 - 40. A pump lifts water from a lake to a large tank...Ch. 6 - 41. Just before striking the ground, a 2.00-kg...Ch. 6 - 42. A 0.50-kg ball falls past a window that is...Ch. 6 - 43. At sea level a nitrogen molecule in the air...Ch. 6 - 44. The coefficient of sliding friction between a...Ch. 6 - 6.45 [II] Consider the simple pendulum shown in...Ch. 6 - 46. A 1200-kg car coasts from rest down a driveway...Ch. 6 - 47. The driver of a 1200-kg car notices that the...Ch. 6 - 48. A 2000-kg elevator rises from rest in the...Ch. 6 - 49. Figure 6-8 shows a bead sliding on a wire. How...Ch. 6 - 50. In Fig. 6-8, h1 = 50.0 cm, h2 = 30.0 cm, and...Ch. 6 - 51. In Fig. 6-8, h1 = 200 cm, h2 = 150 cm, and at...Ch. 6 - 6.52 [I] Imagine a 60.0-kg skier standing still on...Ch. 6 - 53. Considering the skier in the previous problem,...Ch. 6 - 6.54 [II] Considering the skier in the previous...Ch. 6 - 55. A 10.0-kg block is launched up a 30.0°...Ch. 6 - 56. Calculate the average power required to raise...Ch. 6 - 57. Compute the power output of a machine that...Ch. 6 - 58. An engine expends 40.0 hp in propelling a car...Ch. 6 - 6.59 [II] A 1000-kg auto travels up a 3.0 percent...Ch. 6 - 60. A 900-kg car whose motor delivers a maximum...Ch. 6 - 6.61 [II] Water flows from a reservoir at the rate...Ch. 6 - 6.62 [II] Find the mass of the largest box that a...Ch. 6 - 6.63 [II] A 1300-kg car is to accelerate from rest...
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- A block of mass 0.500 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x (Fig. P7.79). The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to point , the bottom of a vertical circular track of radius R = 1.00 m, and continues to move up the track. The blocks speed at the bottom of the track is = 12.0 m/s, and the block experiences an average friction force of 7.00 N while sliding up the track. (a) What is x? (b) If the block were to reach the top of the track, what would be its speed at that point? (c) Does the block actually reach the top of the track, or does it fall off before reaching the top?arrow_forwardAs shown in Figure P7.20, a green bead of mass 25 g slides along a straight wire. The length of the wire from point to point is 0.600 m, and point is 0.200 in higher than point . A constant friction force of magnitude 0.025 0 N acts on the bead. (a) If the bead is released from rest at point , what is its speed at point ? (b) A red bead of mass 25 g slides along a curved wire, subject to a friction force with the same constant magnitude as that on the green bead. If the green and red beads are released simultaneously from rest at point , which bead reaches point first? Explain. Figure P7.20arrow_forwardA certain automobile engine delivers 2.24 104 W (30.0 hp) to its wheels when moving at a constant speed of 27.0 m/s ( 60 mi/h). What is the resistive force acting on the automobile at that speed?arrow_forward
- Assume that the force of a bow on an arrow behaves like the spring force. In aiming the arrow, an archer pulls the bow back 50 cm and holds it in position with a force of 150 N. If the mass of the arrow is 50 g and the “spring” is massless, what is the speed of the arrow immediately after it leaves the bow?arrow_forwardIf the net work done by external forces on a particle is zero, which of the following statements about the particle must be true? (a) Its velocity is zero. (b) Its velocity is decreased. (c) Its velocity is unchanged. (d) Its speed is unchanged. (e) More information is needed.arrow_forwardA 100 — kg man is skiing across level ground at a speed of 8.0 m/s when he comes to the small slope 1.8 m higher than ground level shown in the following figure. (a) If the skier coasts up the bill, what is his speed when he reaches the top plateau? Assume friction between the snow and skis is negligible. (b) What is his speed when he reaches the upper level if an 80 — N frictional force acts on the skis?arrow_forward
- A block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle = 25.0 below the horizontal as shown in Figure P5.8. Determine the work done by (a) the applied force, (b) the normal force exerted by the table, (c) the force of gravity, and (d) the net force on the block. Figure P5.8arrow_forwardAt the start of a basketball game, a referee tosses a basketball straight into the air by giving it some initial speed. After being given that speed, the ball reaches a maximum height of 4.25 m above where it started. Using conservation of energy, find a. the balls initial speed and b. the height of the ball when it has a speed of 2.5 m/s.arrow_forwardWhat average power is generated by a 70.0-kg moun-tain climber who climbs a summit of height 325 in in 95.0 min? (a) 39.1 W (b) 54.6 W (c) 25.5 W (d) 67.0 W (e) 88.4 Warrow_forward
- A 5.00-kg block is set into motion up an inclined plane with an initial speed of i = 8.00 m/s (Fig. P7.21). The block comes to rest after traveling d = 3.00 m along the plane, which is inclined at an angle of = 30.0 to the horizontal. For this motion, determine (a) the change in the blocks kinetic energy, (b) the change in the potential energy of the block-Earth system, and (c) the friction force exerted on the block (assumed to be constant), (d) What is the coefficient of kinetic friction? Figure P7.21arrow_forwardA block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless, horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle = 25.0 below the horizontal as shown in Figure P6.3. Determine the work done on the block by (a) the applied force, (b) the normal force exerted by the table, (c) the gravitational force, and (d) the net force on the block. Figure P6.3arrow_forwardA large cruise ship of mass 6.50 107 kg has a speed of 12.0 m/s at some instant. (a) What is the ships kinetic energy at this time? (b) How much work is required to stop it? (c) What is the magnitude of the constant force required to stop it as it undergoes a displacement of 2.50 km?arrow_forward
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