Problem 1RCQ: What were Aristotles two main classifications of motion? Problem 2RCQ: Did Aristotle believe that forces are necessary to keep moving objects moving, or did he believe... Problem 3RCQ: What two main ideas of Aristotle did Galileo discredit? Problem 4RCQ: Which dominated Galileos way of extending knowledge: philosophical discussion or experiment? Problem 5RCQ: What is the name of the property of objects to maintain their states of motion? Problem 6RCQ: Which depends on gravity: weight or mass? Problem 7RCQ: Where would your weight be greater: on Earth or on the Moon? Where would your mass be greater? Problem 8RCQ: What are the units of measurement for weight and mass? Problem 9RCQ: One kg weighs 10 N on Earth. Would it weigh more or less on the Moon? Problem 10RCQ: Which has the greater density: 1 kg of water or 10 kg of water? Problem 11RCQ: What is the net force on a box that is being pushed to the left with a force of 50 N while it is... Problem 12RCQ: What two quantities are necessary to determine a vector quantity? Problem 13RCQ: What is the name given to a force that occurs in a rope when both ends are pulled in opposite... Problem 14RCQ: How much rope tension holds a 20-N bag of apples at rest? Problem 15RCQ: What is the meaning of F=0? Problem 16RCQ: What test tells us whether or not a moving object is in equilibrium? Problem 17RCQ: One bowling ball sits at rest and another rolls at constant velocity. Which ball is in equilibrium?... Problem 18RCQ: Why is the support force on an object often called the normal force? Problem 19RCQ: When you weigh yourself, how does the support force of the scale acting on you compare with the... Problem 20RCQ: How does the direction of a friction force compare with the direction of motion of a sliding object? Problem 21RCQ: If you push on a heavy crate to the right and it slides, what is the direction of friction on the... Problem 22RCQ: Suppose you push on a heavy crate, but not hard enough to make it slide. Does a friction force act... Problem 23RCQ: What equation shows the relationship among speed, distance, and time? Problem 24RCQ: Why do we say that velocity is a vector and speed is not a vector? Problem 25RCQ: Does the speedometer on a vehicle show the average speed or the instantaneous speed? Problem 26RCQ: How can you be at rest and also moving at 100,000 km/h at the same time? Problem 27RCQ: What equation shows the relationship among velocity, time, and acceleration? Problem 28RCQ: What is the acceleration of an object in free fall at Earths surface? Problem 29RCQ: Why does the unit of time appear twice in the definition of acceleration? Problem 30RCQ: When you toss a ball upward, by how much does its upward speed decrease each second? Problem 31TIS: Joints are places where bones meet. Many of them, such as the ball-and-socket joints in your... Problem 33TIS: In what way does friction affect an earthquake? Problem 34TIS: When during a standing jump is your speed zero? Problem 35TIS: What is the record-breaking height for a standing jump? Problem 37TIS: What are some anatomical features that affect an animals jumping ability? Problem 43PC: Show that the average speed of a rabbit that runs a distance of 30 m in a time of 2 s is 15 m/s. Problem 44PC: Calculate your average walking speed when you step 1.0m in 0.5s Problem 45PC: Show that the acceleration of a hamster is 5m/s2 when it increases its velocity from rest to 10m/s... Problem 46PC: Show that the acceleration of a car that can go from rest to 100km/h in 10s is 10km/hs Problem 47PC: Show that the acceleration of a rock that reaches a speed of 40m/s in 4s is 10m/s2 Problem 48PC: Show that Careless Cary who slips from the rung of a ship ladder falls slightly more than 11 meters... Problem 49PC: Show that a basketball player who jumps vertically for 12 second increases her reach by 1.2 meters.... Problem 50TC: The weights of Burl, Paul, and the scaffold produce tensions in the supporting ropes. Rank the... Problem 51TC: Rank the net forces on the block from greatest to least in the four situations A, B, C, and D. Problem 52TC: Different materials, A, B, C, and D, rest on a table. a From greatest to least, rank them by how... Problem 53TC: Three pucks, A, B, and C, are sliding across ice at the given speeds. The forces of air and ice... Problem 54TS: Find the strength of the net force on a crate that is pushed with a 30-N force and a 20-N force... Problem 55TS: Lucy Lightfoot stands with one foot on one bathroom scale and her other foot on a second bathroom... Problem 56TS: A ball is thrown straight up with an initial speed of 40 m/s. a Show that its time in the air is... Problem 57TS: The sketch shows a painters scaffold in mechanical equilibrium. The person in the middle weighs 500... Problem 58TS: A different scaffold that weighs 400 N supports two painters, one 500 N and the other 400 N. The... Problem 59TS: A vehicle changes its velocity from 90km/h to a dead stop in 10s. Show that its acceleration in... Problem 60TS: Extend Table 2.2 which gives values from 0 to 5 s from 6 to 10 s, assuming no air resistance. Problem 61TS: An airplane starting from rest on a runway accelerates uniformly at 2.0m/s2 for 15s before takeoff.... Problem 62TE: Knowledge can be gained by philosophical logic and also by experimentation. Which of these did... Problem 63TE: Which of Aristotles ideas did Galileo discredit with his inclined plane experiments? Problem 64TE: Your friend says that a ball rolling down a flat inclined plane increases both its speed and its... Problem 65TE: A ball at the end of a string makes a pendulum. If you raise the ball a given distance and release... Problem 67TE: Which has more mass, a 2-kg fluffy pillow or a 3-kg small piece of iron? Which has more volume? Why... Problem 68TE: Gravitational force on the Moon is merely 1/6 that of gravitational force on Earth. What would be... Problem 69TE: A monkey hangs stationary at the end of a vertical vine. What two forces act on the monkey? Which... Problem 70TE: Suppose the monkey weighs 100 N and the vine supporting her pulls upward with a force of 120 N. What... Problem 71TE: Nellie hangs suspended at rest from the ends of the rope as shown. How does the reading on the scale... Problem 72TE: Nellie Newton stands at rest on a bathroom scale. How does the reading on the scale compare with her... Problem 73TE: Can a basketball player halfway through a jump in midair be in equilibrium? Why or why not? Problem 74TE: Little Hudson as shown in the opening photo of this chapter is being tossed upward by his dad. When... Problem 75TE: An empty 50-N jug rests on a table. What is the support force exerted by the table on the jug? What... Problem 76TE: A book that weighs 15 N is at rest on a table. How many newtons of support force does the table... Problem 77TE: The falling speedometer of Figure 2.24 shows readings of speed as it falls. How would the readings... Problem 78TE: In Figure 2.13, we see Marie pushing horizontally on a table that slides across the floor at... Problem 79TE: Suppose that a free-falling object were somehow equipped with a speedometer. By how much would its... Problem 80TE: For a free-falling object dropped from rest, what is its speed at the end of 5 s? At the end of 10 s... Problem 81TE: What is the acceleration of a car that moves at a steady velocity of 100 km/h for 100 s? Why is this... Problem 82TE: Correct your friend who says, Japans bullet trains can easily round a curve at a constant velocity... Problem 83TE: An airplane flies horizontally at a constant velocity of 200 m/s for 10 seconds. A friend says its... Problem 84TE: You toss a coin vertically upward in the air. Assuming no air resistance, a will it return to your... Problem 85TDI: Does a person on a diet more accurately lose mass or lose weight? Defend your answer. Problem 86TDI: Gracie says acceleration is how fast you go. Alex says acceleration is how fast you get fast. They... Problem 87TDI: Your friend says that a ball in free fall experiences both an increase in its speed and its... Problem 89TDI: Harry the painter swings year after year from his bosuns chair. His weight is 500 N, and the rope,... Problem 90TDI: When a ballplayer throws a ball straight up, by how much does the speed of the ball decrease each... Problem 91TDI: Someone standing on the edge of a cliff as in Figure 2.25 throws a ball straight up at a certain... Problem 92TDI: For a freely falling object dropped from rest, what is its acceleration at the end of the fifth... Problem 93TDI: Two balls, A and B, are released simultaneously from rest at the left end of the equal-length... Problem 1RAT: According to Galileo, inertia is a a force like any other force. b special kind of force. c property... Problem 2RAT: An object with a very small mass must also have a very small a weight. b volume. c size. d all of... Problem 3RAT: The equilibrium rule F=0 applies to a objects or systems at rest. b objects or systems in uniform... Problem 4RAT: A man weighing 800 N stands at rest on two bathroom scales so that one scale shows a reading of 500... Problem 5RAT: If an object moves along a straight-line path at constant speed, then it must be a accelerating. b... Problem 6RAT: What is the net force on a box of chocolates when pushed across a table with a horizontal force of... Problem 7RAT: Neglecting air resistance, when you toss a rock upward, by about how much does its upward speed... Problem 8RAT: During each second of free fall, the speed of an object a increases by the same amount. b changes by... Problem 9RAT: A freely falling object has a speed of 40 m/s at one instant. Exactly 1 s later its speed will be a... Problem 10RAT: The vertical height attained by a basketball player who achieves a hang time of a full 1 s is about... format_list_bulleted