Problem 1CQ: Driving down the road, you hit the brakes suddenly. As a result, your body moves toward the front of... Problem 2CQ: Youve probably seen pictures of someone pulling a tablecloth out from under glasses, plates, and... Problem 3CQ: As you read this, you are most likely sitting quietly in a chair. Can you conclude, therefore, that... Problem 4CQ: When a dog gets wet, it shakes its body from head to tail to shed the water. Explain, in terms of... Problem 5CQ: A young girl slides down a rope. As she slides faster and faster she tightens her grip, increasing... Problem 6CQ: A block of mass m hangs from a string attached to a ceiling, as shown in Figure 5-24. An identical... Problem 7CQ: An astronaut on a space walk discovers that his jet pack no longer works, leaving him stranded 50 m... Problem 8CQ: Two untethered astronauts on a space walk decide to take a break and play catch with a baseball.... Problem 9CQ: In Figure 5-25 Wilbur asks Mr. Ed, the talking horse, to pull a cart Mr. Ed replies that he would... Problem 10CQ: A whole brick has more mass than half a brick, thus the whole brick is harder to accelerate. Why... Problem 11CQ: The force exerted by gravity on a whole brick is greater than the force exerted by gravity on half a... Problem 12CQ: Is it possible for an object at rest to have only a single force acting on it? If your answer is... Problem 13CQ: Is it possible for an object to be in motion and yet have zero net force acting on it? Explain. Problem 14CQ: A bird cage, with a parrot inside, hangs from a scale The parrot decides to hop to a higher perch.... Problem 15CQ: Suppose you jump from the cliffs of Acapulco and perform a perfect swan dive. As you fall, you exert... Problem 16CQ: A friend tells you that since his car is at rest, there are no forces acting on it. How would you... Problem 17CQ: Since all objects are weightless in orbit, how is it possible for an orbiting astronaut to tell if... Problem 18CQ: To clean a rug, you can hang it from a clothesline and beat it with a tennis racket. Use Newtons... Problem 19CQ: If you step off a high board and drop to the water below, you plunge into the water without injury.... Problem 20CQ: Is it possible for an object to be moving in one direction while the net force acting on it is in... Problem 21CQ: Since a bucket of water is weightless in space, would it hurt to kick the bucket? Explain. Problem 22CQ: In the movie The Rocketeer, a teenager discovers a jet-powered backpack in an old barn. The backpack... Problem 23CQ: List three common objects that have a weight of approximately 1 N. Problem 1PCE: An object of mass m is initially at rest. After a force of magnitude F acts on it for a time T, the... Problem 2PCE: On a planet far, far away, an astronaut picks up a rock. The rock has a mass of 5.00 kg, and on this... Problem 3PCE: In a grocery store, you push a 15.4-kg shopping cart horizontally with a force of 13.4 N. If the... Problem 4PCE: You are pulling your little sister on her sled across an icy (frictionless) surface. When you exert... Problem 5PCE: A 0.53-kg billiard ball initially at rest is given a speed of 12 m/s during a time interval of 4.0... Problem 6PCE: A 92-kg water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 25... Problem 7PCE: A 0.5-kg object is acted on by a force whose x component varies with time as shown in Figure 5-26.... Problem 8PCE: Predict/Explain You drop two balls of equal diameter from the same height at the same time. Ball 1... Problem 9PCE: Predict/Calculate A 42.0-kg parachutist is moving straight downward with a speed of 3.85 m/s. (a) If... Problem 10PCE: Predict/Calculate In baseball, a pitcher can accelerate a 0.15 kg ball from rest to 98 mi/h in a... Problem 11PCE: A major-league catcher gloves a 92 mi/h pitch and brings it to rest in 0.15 m. If the force exerted... Problem 12PCE: Driving home from school one day, you spot a ball rolling out into the street (Figure 5-27). You... Problem 13PCE: Stopping a 747 A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If... Problem 14PCE: The Ux-versus-time graph for a 1.8-kg object is shown in Figure 5-28. A single force acts on the... Problem 15PCE: Predict/Calculate A drag racer crosses the finish line doing 202 mi/h and promptly deploys her drag... Problem 16PCE: Predict/Explain A small car collides with a large truck (a) Is the magnitude of the force... Problem 17PCE: Predict/Explain A small car collides with a large truck. (a) is the acceleration experienced by the... Problem 18PCE: As you catch a 0.14-kg ball it accelerates at 320m/s2 and comes to rest in your hand. What force... Problem 19PCE: BIO Woodpecker Concussion Prevention A woodpecker exerts a 230-N force on a tree trunk during its... Problem 20PCE: On vacation, your 1400-kg car pulls a 560-kg trailer away from a stoplight with an acceleration of... Problem 21PCE: Predict/Calculate An 85-kg parent and a ?4-kg child meet at the center of an ice rink. They place... Problem 22PCE: A force of magnitude 7.50 N pushes three boxes with masses m1 = 1 .30 kg, m2 = 3.20 kg, and m3 =... Problem 23PCE: A force of magnitude 7.50 N pushes three boxes with masses m1 = 1.30 kg, m2 = 3.20 kg, and m3 = 4.90... Problem 24PCE: Predict/Calculate Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a... Problem 25PCE: A skateboarder on a ramp is accelerated by a nonzero net force. For each of the following... Problem 26PCE: Three objects, A, B, and C, have x and y components of velocity that vary with time as shown in... Problem 27PCE: A farm tractor tows a 3300-kg trailer up a 14 incline with a steady speed of 2.8 m/s. What force... Problem 28PCE: A shopper pushes a 7 5-kg shopping cart up a 13 incline, as shown in Figure 5-32. Find the magnitude... Problem 29PCE: Two crewmen pull a rail through a lock, as shown in Figure 5-33. One crewman pulls with a force of... Problem 30PCE: A hockey puck is acted on by one or more forces as shown in Figure 5-34. Rank the four cases. A, B,... Problem 31PCE: To give a 19-kg child a ride, two teenagers pull on a 3.7-kg sled with ropes as indicated in Figure... Problem 32PCE: Predict/Calculate A 65-kg skier speeds down a trail as shown in Figure 5-36 The surface is smooth... Problem 33PCE: An object acted on by three forces moves with constant velocity. One force acting on the object is... Problem 34PCE: A train is traveling up a 2 88 incline at a speed of 4.31 m/s when the last car breaks free and... Problem 35PCE: The Force Exerted on the Moon In Figure 5-37 we show the Earth, Moon, and Sun (not to scale) in... Problem 36PCE: You pull upward on a stuffed suitcase with a force of 105 N, and it accelerates upward at 0. 725... Problem 37PCE: BIO Brain Growth A newborn babys brain grows rapidly. In fact, it has been found to increase in mass... Problem 38PCE: Suppose a rocket launches with an acceleration of 30.5 m/s2. What is the apparent weight of a 92-kg... Problem 39PCE: During an episode of turbulence in an airplane you feel 190 N heavier than usual. If your mass is 78... Problem 40PCE: At the bow of a ship on a stormy sea, a crewman conducts an experiment by standing on a bathroom... Problem 41PCE: Predict/Calculate As part of a physics experiment you stand on a bathroom scale in an elevator... Problem 42PCE: When you weigh yourself on good old terra firma (solid ground), your weight is 142 lb. In an... Problem 43PCE: Predict/Calculate BIO Flight of the Samara A 1.21-g samarathe winged fruit of a maple tree falls... Problem 44PCE: When you lift a bowling ball with a force of 82 N, the ball accelerates upward with an acceleration... Problem 45PCE: A 23-kg suitcase is pulled with constant speed by a handle at an angle of 25 above the horizontal.... Problem 46PCE: (a) Draw a free-body diagram for the skier in Problem 32. (b) Determine the normal force acting on... Problem 47PCE: A 9.3-kg child sits in a 3.7-kg high chair. (a) Draw a free-body diagram for the child, and find the... Problem 48PCE: Figure 5-39 shows the normal force N experienced by a rider of weight W = mg on a Ferris wheel as a... Problem 49PCE: Figure 5-40 shows the normal force N as a function of the angle for the suitcase shown in Figure... Problem 50PCE: A 5.0-kg bag of potatoes sits on the bottom of a stationary shopping cart. (a) Sketch a free-body... Problem 51PCE: Predict/Calculate (a) Find the normal force exerted on a 2.9 kg book resting on a surface inclined... Problem 52PCE: Predict/Calculate A gardener mows a lawn with an old-fashioned push mower. The handle of the mower... Problem 53PCE: Figure 5-41 Problems 53 53 An ant walks slowly away from the top of a bowling ball, as shown in... Problem 54GP: CE Predict/Explain Riding in an elevator moving upward with constant speed, you begin a game of... Problem 55GP: CE Predict/Explain Riding in an elevator moving with a constant upward acceleration, you begin a... Problem 56GP: CE Give the direction of the net force acting on each of the following objects. If the net force is... Problem 57GP: CE Predict/Explain You jump out of an airplane and open your parachute after an extended period of... Problem 58GP: In a tennis serve, a 0.070-kg ball can be accelerated from rest to 36 m/s over a distance of 0. 75m.... Problem 59GP: BIO Human Heart Force The left ventricle of the human heart expels about 0.070 kg of oxygenated... Problem 60GP: A 51 5-kg swimmer with an initial speed of 1.25 m/s decides to coast until she comes to rest. If she... Problem 61GP: The ax-versus-time graph for a 2.0-kg object is shown in Figure 5-42. Draw the corresponding... Problem 62GP: A skateboarder starts from rest and rolls down a ramp that is inclined at an angle of 15 below the... Problem 63GP: The rotors of a 15,200-kg heavy-lift helicopter exert a downward force of 322,000 N in order to... Problem 64GP: As it pulls itself up to a branch, a chimpanzee accelerates upward at 2.2 m/s2 at the instant it... Problem 65GP: CE Each of the three identical hockey pucks shown in Figure 5-44 is acted on by a 3-N force. Puck A... Problem 66GP: Predict/Calculate The VASIMR Rocket NASA plans to use a new type of rocket, a Variable Specific... Problem 67GP: An object of mass m = 5.95 kg has an acceleration a=(1.17m/s2)x+(1.17m/s2)y. Three forces act on... Problem 68GP: At the local grocery store, you push a 14.5-kg shopping cart. You stop for a moment to add a bag of... Problem 69GP: BIO Predict/Calculate The Force of Running Biomechanical research has shown that when a 67-kg person... Problem 70GP: BIO Predict/Calculate Grasshopper Liftoff To become airborne, a 2.0-g grasshopper requires a takeoff... Problem 71GP: Takeoff from an Aircraft Carrier On an aircraft carrier, a jet can be catapulted from 0 to 155 mi/h... Problem 72GP: The Ux-versus-time graph for a 1.8-kg object is shown in Figure 5-28. A single force acts on the... Problem 73GP: Predict/Calculate An archer shoots a 0.024-kg arrow at a target with a speed of 54 m/s. When it hits... Problem 74GP: An apple of mass m = 0.13 kg falls out of a tree from a height h = 3.2m (a) What is the magnitude of... Problem 75GP: BIO The Fall of T. rex Paleontologists estimate that if a Tyrannosaurus rex had tripped and fallen,... Problem 76GP: Deep Space 1 The NASA spacecraft Deep Space 1 was shut down on December 18, 2001, following a... Problem 77GP: Your groceries are in a bag with paper handles. The two handles together will tear off if a force... Problem 78GP: BIO A Leafhopper's Leap The motion of jumping insects is of interest not only to biologists, but... Problem 79GP: Predict/Calculate At the airport, you observe some of the jets as they take off. With your watch you... Problem 80GP Problem 81GP: Two boxes are at rest on a smooth, horizontal surface. The boxes are in contact with one another. If... Problem 82GP: You have been hired to help improve the material movement system at a manufacturing plant. Boxes... Problem 83GP Problem 84GP: A baseball of mass m and initial speed U strikes a catchers mitt. If the mitt moves a distance x as... Problem 85GP: When two people push in the same direction on an object of mass m they cause an acceleration of... Problem 86GP: An air-track cart of mass m1 = 0.14 kg is moving with a speed v0 = 1.3 m/s to the right when it... Problem 87PP: BIO Increasing Safety in a Collision Safety experts say trial an automobile accident is really a... Problem 88PP: BIO Increasing Safety in a Collision Safety experts say trial an automobile accident is really a... Problem 89PP: BIO Increasing Safety in a Collision Safety experts say trial an automobile accident is really a... Problem 90PP: BIO Increasing Safety in a Collision Safety experts say trial an automobile accident is really a... Problem 91PP: Predict/Calculate Referring to Example 5-8 Suppose that we would like the contact force between the... Problem 92PP: Referring to Example 5-8 Suppose the force of 30.0 N pushes on two boxes of unknown mass. We know... Problem 93PP: Predict/Calculate Referring to Figure 5-13 Suppose the magnitude of F2 is increased from 41 N to 55... Problem 94PP: Predict/Calculate Referring to Figure 5-13 Suppose we would like the acceleration of the satellite... format_list_bulleted
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