 7.1: The International Space Station orbits the Earth in an approximatel...
 7.2: Apendulum bob swings from point I to point II along the circular ar...
 7.3: A pendulum bob swings from point II to point III along the circular...
 7.4: Afarmhand pushes a 26kg bale of hay 3.9 m across the oor of a barn...
 7.5: Children in a tree house lift a small dog in a basket 4.70 m up to ...
 7.6: Early one October, you go to a pumpkin patch to select your Hallowe...
 7.7: The coefcient of kinetic friction between a suitcase and the oor is...
 7.8: You pick up a 3.4kg can of paint from the ground and lift it to a ...
 7.9: A tow rope, parallel to the water, pulls a water skier directly beh...
 7.10: In the situation described in the previous problem, (a)is the work ...
 7.11: A child pulls a friend in a little red wagon with constant speed. I...
 7.12: A51kg packing crate is pulled with constant speed across a rough o...
 7.13: To clean a oor, a janitor pushes on a mop handle with a force of 50...
 7.14: Asmall plane tows a glider at constant speed and altitude. If the p...
 7.15: A young woman on a skateboard is pulled by a rope attached to a bic...
 7.16: To keep her dog from running away while she talks to a friend, Susa...
 7.17: Water skiers often ride to one side of the center line of a boat, a...
 7.18: Apitcher throws a ball at 90 mi/h and the catcher stops it in her g...
 7.19: How much work is needed for a 73kg runner to accelerate from rest ...
 7.20: Skylabs Reentry When Skylab reentered the Earths atmosphere on July...
 7.21: A9.50g bullet has a speed of 1.30 km/s. (a) What is its kinetic en...
 7.22: Predict/ExplainThe work accelerates a car from 0 to 50 km/h. (a) Is...
 7.23: Jogger Ahas a mass mand a speed v, jogger B has a mass m/2 and a sp...
 7.24: A 0.14kg pinecone falls 16 m to the ground, where it lands with a ...
 7.25: In the previous problem, (a) how much work was done on the pinecone...
 7.26: At , a 0.40kg object is falling with a speed of 6.0 m/s. At , it h...
 7.27: After hitting a long y ball that goes over the right elders head an...
 7.28: A1100kg car coasts on a horizontal road with a speed of 19 m/s. Af...
 7.29: (a)In the previous problem, the cars speed decreased by 7.0 m/s as ...
 7.30: A 65kg bicyclist rides his 8.8kg bicycle with a speed of 14 m/s. ...
 7.31: Ablock of mass mand speed vcollides with a spring, compressing it a...
 7.32: Aspring with a force constant of is initially at its equilibrium le...
 7.33: A 1.2kg block is held against a spring of force constant , compres...
 7.34: Initially sliding with a speed of 2.2 m/s, a 1.8kg block collides ...
 7.35: The force shown in Figure 716 moves an object from to . (a) How muc...
 7.36: An object is acted on by the force shown in Figure 717. What is the...
 7.37: A block of mass m and speed v collides with a spring, compressing i...
 7.38: To compress spring 1 by 0.20 m takes 150 J of work. Stretching spri...
 7.39: It takes 180 J of work to compress a certain spring 0.15 m. (a)What...
 7.40: The force shown in Figure 717acts on a 1.7kg object whose initial ...
 7.41: A block is acted on by a force that varies as for , and then remain...
 7.42: Force does 5 J of work in 10 seconds, force does 3 J of work in 5 s...
 7.43: Climbing the Empire State Building A new record for running the sta...
 7.44: How many joules of energy are in a kilowatthour?
 7.45: Calculate the power output of a 1.4g y as it walks straight up a w...
 7.46: An ice cube is placed in a microwave oven. Suppose the oven deliver...
 7.47: You raise a bucket of water from the bottom of a deep well. If your...
 7.48: In order to keep a leaking ship from sinking, it is necessary to pu...
 7.49: Akayaker paddles with a power output of 50.0 W to maintain a steady...
 7.50: HumanPowered Flight Humanpowered aircraft require a pilot to peda...
 7.51: Agrandfather clock is powered by the descent of a 4.35kg weight. (...
 7.52: The Power You Produce Estimate the power you produce in running up ...
 7.53: Acertain car can accelerate from rest to the speed v in T seconds. ...
 7.54: As the three small sailboats shown in Figure 718 drift next to a do...
 7.55: Ayoungster rides on a skateboard with a speed of 2 m/s. After a for...
 7.56: Predict/Explain Acar is accelerated by a constant force, F. The dis...
 7.57: Car 1 has four times the mass of car 2, but they both have the same...
 7.58: Muscle Cells Biological muscle cells can be thought of as nanomotor...
 7.59: When you take a bite out of an apple, you do about 19 J of work. Es...
 7.60: AMountain bar has a mass of 0.045 kg and a calorie rating of 210 Ca...
 7.61: Asmall motor runs a lift that raises a load of bricks weighing 836 ...
 7.62: You push a 67kg box across a oor where the coefcient of kinetic fr...
 7.63: The Beating Heart The average power output of the human heart is 1....
 7.64: The Atmos Clock The Atmos clock (the socalled perpetual motion clo...
 7.65: The work is required to accelerate a car from rest to the speed . H...
 7.66: Awork is required to stretch a certain spring 2 cm from its equilib...
 7.67: After a tornado, a 0.55g straw was found embedded 2.3 cm into the ...
 7.68: You throw a glove straight upward to celebrate a victory. Its initi...
 7.69: The water skier in Figure 715 is at an angle of 35 with respect to ...
 7.70: Asled with a mass of 5.80 kg is pulled along the ground through a d...
 7.71: A0.19kg apple falls from a branch 3.5 m above the ground. (a)Does ...
 7.72: Ajuggling ball of mass mis thrown straight upward from an initial h...
 7.73: The force shown in Figure 719 acts on an object that moves along th...
 7.74: Calculate the power output of a 1.8g spider as it walks up a windo...
 7.75: The motor of a ski boat produces a power of 36,600 W to maintain a ...
 7.76: Cookie Power To make a batch of cookies, you mix half a bag of choc...
 7.77: A pitcher accelerates a 0.14kg hardball from rest to 42.5 m/s in 0...
 7.78: Catapult Launcher Acatapult launcher on an aircraft carrier acceler...
 7.79: Brain Power The human brain consumes about 22 W of power under norm...
 7.80: A1300kg car delivers a constant 49 hp to the drive wheels. We assu...
 7.81: Meteorite On October 9, 1992, a 27pound meteorite struck a car in ...
 7.82: Powering a Pigeon A pigeon in ight experiences a force of air resis...
 7.83: Springs in Series Two springs, with force constants and , are conne...
 7.84: Springs in Parallel Two springs, with force constants and , are con...
 7.85: Ablock rests on a horizontal frictionless surface. Astring is attac...
 7.86: Estimate the range of ight speeds for Microraptor gui if its power ...
 7.87: What approximate range of ight speeds would be possible if Microrap...
 7.88: How much energy would Microraptor have to expend to y with a speed ...
 7.89: Estimate the minimum force that Microraptormust exert to y. A. 0.65...
 7.90: Referring to Figure 712 Suppose the block has a mass of 1.4 kg and ...
 7.91: Referring to Figure 712 In the situation shown in Figure 712 (d), a...
 7.92: Referring to Example 78 Suppose the car has a mass of 1400 kg and d...
Solutions for Chapter 7: Physics 4th Edition
Full solutions for Physics  4th Edition
ISBN: 9780321611116
Solutions for Chapter 7
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Solutions for Chapter 7
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Key Physics Terms and definitions covered in this textbook

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parallel

any symbol
average (indicated by a bar over a symbol—e.g., v¯ is average velocity)

°C
Celsius degree

°F
Fahrenheit degree