Problem 1CQ: If an object is not moving, does that mean that there are no forces acting on it? Explain. Problem 2CQ: An object moves in a straight line at a constant speed. Is it true that there must be no forces of... Problem 3CQ: If you know all of the forces acting on a moving object, can you tell in which direction the object... Problem 4CQ: Three arrows are shot horizontally. They have left the bow and are traveling parallel to the ground... Problem 5CQ Problem 6CQ: Internal injuries in vehicular acci-dents may be due to what is called the third collision. The... Problem 7CQ: Heres a great everyday use of the physics described in this chapter. If you are trying to get... Problem 8CQ Problem 9CQ: Suppose you are an astronaut in deep space, far from any source of gravity. You have two objects... Problem 10CQ: Jonathan accelerates away from a stop sign. His eight-year-old daughter sits in the passenger seat.... Problem 11CQ Problem 12CQ Problem 13CQ: Josh and Taylor, standing face-to-face on frictionless ice, push off each other, causing each to... Problem 14CQ: A person sits on a sloped hillside. Is it ever possible to have the static friction force on this... Problem 15CQ: Walking without slipping requires a static friction force between your feet (or footwear) and the... Problem 16CQ: Figure 4.30 b showed a situation in which the force of the road on the cars tire points forward. In... Problem 17CQ Problem 18CQ Problem 19CQ: The tire on this drag racer is severely twisted: The force of the road on the tire is quite large... Problem 20CQ: Suppose that, while in a squatting position, you stand on your hands, and then you pull up on your... Problem 21MCQ: A block has acceleration a when pulled by a string. If two identical blocks are glued together and... Problem 22MCQ: A 5.0 kg block has an acceleration of 0.20 m/s2 when a force is exerted on it. A second block has an... Problem 23MCQ: Tennis balls experience a large drag force. A tennis ball is hit so that it goes straight up and... Problem 24MCQ: A group of students is making model cars that will be propelled by model rocket engines. These... Problem 25MCQ: A person gives a box a shove so that it slides up a ramp, then reverses its motion and slides down.... Problem 26MCQ Problem 27MCQ: As shown in the chapter, scallops use jet propulsion to move from one place to another. Their shells... Problem 28MCQ Problem 29MCQ Problem 30MCQ: Dave pushes his four-year-old son Thomas across the snow on a sled. As Dave pushes, Thomas speeds... Problem 31MCQ: Figure Q4.29 shows block A sitting on top of block B. A constant force F is exerted on block B,... Problem 1P: Whiplash injuries during an automobile accident are caused by the inertia of the head. If someone is... Problem 2P: An automobile has a head-on collision. A passenger in the car experiences a compression injury to... Problem 3P: In a head-on collision, an infant is much safer in a child safety seat when the seat is installed... Problem 4P: Problems 4 through 6 show two forces acting on an object at rest. Redraw the diagram, then add a... Problem 5P: Problems 4 through 6 show two forces acting on an object at rest. Redraw the diagram, then add a... Problem 6P: Problems 4 through 6 show two forces acting on an object at rest. Redraw the diagram, then add a... Problem 7P Problem 8P Problem 9P: A baseball player is sliding into second base. Identify the forces on the baseball player. Problem 10P: A jet plane is speeding down the runway during takeoff. Air resistance is not negligible. Identify... Problem 11P: A skier is sliding down a 15 slope. Friction is not negligible. Identify the forces on the skier. Problem 12P: A falcon is hovering above the ground, then suddenly pulls in its wings and begins to fall toward... Problem 13P: Figure P4.13 shows an acceleration-versus-force graph for three objects pulled by rubber bands. The... Problem 14P: A constant force applied to object A causes it to accelerate at 5 m/s2. The same force applied to... Problem 15P: A compact car has a maximum acceleration of 4.0 m/s2 when it carries only the driver and has a total... Problem 16P Problem 17P: A constant force is applied to an object, causing the object to accelerate at 8.0 m/s2. What will... Problem 18P: A man pulling an empty wagon causes it to accelerate at 1.4 m/s2 What will the acceleration be if he... Problem 19P Problem 20P: Scallops eject water from their shells to provide a thrust force. The graph shows a smoothed graph... Problem 21P: Figure P4.21 shows an objects acceleration-versus-force graph. What is the objects mass? Figure... Problem 22P Problem 23P: Two children fight over a 200 g stuffed bear. The 25 kg boy pulls to the right with a 15 N force and... Problem 24P Problem 25P Problem 26P Problem 27P Problem 28P Problem 29P: Problems 27 through 29 show a free-body diagram. For each problem, (a) redraw the free-body diagram... Problem 30P: Problems 27 through 29 show a free-body diagram. For each problem, (a) redraw the free-body diagram... Problem 31P: Problems 27 through 29 show a free-body diagram. For each problem, (a) redraw the free-body diagram... Problem 32P Problem 33P: Problems 30 through 38 describe a situation. For each problem, identify all the forces acting on the... Problem 34P: Problems 30 through 38 describe a situation. For each problem, identify all the forces acting on the... Problem 35P: Problems 30 through 38 describe a situation. For each problem, identify all the forces acting on the... Problem 36P: Problems 30 through 38 describe a situation. For each problem, identify all the forces acting on the... Problem 37P: Problems 30 through 38 describe a situation. For each problem, identify all the forces acting on the... Problem 38P Problem 39P: Problems 30 through 38 describe a situation. For each problem, identify all the forces acting on the... Problem 40P: Problems 30 through 38 describe a situation. For each problem, identify all the forces acting on the... Problem 41P Problem 42P Problem 43P: Three ice skaters, numbered 1, 2, and 3, stand in a line, each with her hands on the shoulders of... Problem 44P: A girl stands on a sofa. Identify all the action/reaction pairs of forces between the girl and the... Problem 45P: A car is skidding to a stop on a level stretch of road. Identify all the action/reaction pairs of... Problem 46P: Squid use jet propulsion for rapid escapes. A squid pulls water into its body and then rapidly... Problem 47GP Problem 48GP Problem 49GP Problem 50GP Problem 51GP Problem 52GP Problem 53GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 54GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 55GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 56GP Problem 57GP Problem 58GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 59GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 60GP Problem 61GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 62GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 63GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 64GP: Problems 49 through 61 describe a situation. For each problem, draw a motion diagram, a force... Problem 65GP: A bag of groceries is on the back seat of your car as you stop for a stop light. The bag does not... Problem 66GP: A car has a mass of 1500 kg. If the driver applies the brakes while on a gravel road, the maximum... Problem 67GP Problem 69GP Problem 70GP Problem 71GP Problem 72GP: The froghopper, champion leaper of the insect world, can jump straight up at 4.0 m/s. The jump... Problem 73GP: A beach ball is thrown straight up, and some time later it lands on the sand. Is the magnitude of... Problem 74MSPP: If your car is stuck in the mud and you dont have a winch to pull it out, you can use a piece of... Problem 75MSPP Problem 76MSPP Problem 77MSPP: If your car is stuck in the mud and you don't have a winch to pull it out, you can use a piece of... format_list_bulleted