Problem 1RCQ: What is Newtons first law of motion? Problem 2RCQ: What kind of path would the planets follow if suddenly their attraction to the Sun no longer... Problem 3RCQ: aExpress Newtons second law of motion in words. bThen express it abbreviated with symbols. Problem 4RCQ: aIs acceleration directly proportional to force, or is it inversely proportional to force? Give an... Problem 5RCQ: If the mass of a sliding block is tripled at the same time the net force on it is tripled, how does... Problem 6RCQ: What is the acceleration of a 10-N feely falling body? Problem 7RCQ: Why doesnt a heavy object accelerate more than a light object when both are freely falling? Problem 8RCQ: What is the acceleration of a falling object that has reached its terminal velocity? Problem 9RCQ: What two quantities affect air resistance? Problem 10RCQ: Who falls faster when wearing the same-size parachute a heavy person or a light person or do both... Problem 11RCQ: How many forces are required for a single interaction? Problem 12RCQ: When you push against a wall with your fingers, they bend because they experience a force. What is... Problem 13RCQ: A boxer can hit a heavy bag with a great force. Why cant he hit a sheet of newspaper in midair with... Problem 14RCQ: What is Newtons third law of motion? Problem 15RCQ: If we call the force of a bat hitting a ball the action force, what is the reaction force? Problem 16RCQ: Do action and reaction forces act in succession or simultaneously? Problem 17RCQ: If the forces that act on the cannonball and the recoiling cannon from which it is fired are equal... Problem 18RCQ: What is needed to accelerate a system? Problem 19RCQ: Cite three examples of a vector quantity. Then cite three examples of a scalar quantity. Problem 20RCQ: What is the resultant of two equal-magnitude vectors at right angles to each other? Problem 21RCQ: According to the parallelogram rule, what does the diagonal of constructed parallelogram represent? Problem 22RCQ: Can it be said that, when two vectors are at right angles to each other, the resultant is greater... Problem 23RCQ: What change in magnitude occurs for the vertical component of a ball tossed at an angle upward? For... Problem 24RCQ: Newtons laws of motion are valid for most our experiences. When are they invalid? Problem 25RCQ: Does Hudsons speed undergo a change when tossed upward by his dad Figure 3.33? Does his acceleration... Problem 26TIS: What is gliding locomotion? Problem 27TIS: Why is having a large surface area important for effective gliding? Problem 28TIS: Describe some of the physical characteristics that gliding organisms have evolved to increase their... Problem 29TIS: Explain how Newtons third law underlies many form of locomotion from fish, to birds, to humans. Problem 30TIS: A squid propels itself forward by pushing water backward. Why does this occur? Problem 31TIS: When you walk, what is the force that pushes you forward? Problem 32TIS: Why does a duck in an oil spill find it difficult to walk? Problem 37PC: In Chapter 2, acceleration is defined asa=v/t. Use this formula to show that the acceleration of a... Problem 38PC: In this chapter, we learned that the cause of acceleration is given by Newtons second law:a=Fm/m.... Problem 39PC: If you know that1kgobject weighs10N, confirm that the acceleration of a1kg stone in free fall... Problem 40PC: A simple rearrangement of Newtons second law givesFnet=ma. Show that a net force of 84Nis needed to... Problem 41TC: Four boxes of different masses are on a friction free, level table. From greatest to the least, rank... Problem 42TC Problem 43TC: Three parachutists, A, B and C, each have reached terminal velocityat the same altitude. a From... Problem 44TC: In cases A, B and C, the crate is in equillibriumno acceleration. From gratest to least, rank the... Problem 45TC: The strong man is pulled in the three situations shown. Rank the amounts of tension in the rope in... Problem 46TS: One pound is the same as 4.45 newtons. What is the weight in pounds of 1 newton? Problem 47TS: If Lillian weighs 500 N, what is her weight in pounds? Problem 48TS: Consider a mass of 1kg accelerated 1m/s2by a force of 1N. Show that the acceleration would be the... Problem 49TS: Consider a business jet of mass 30,000kgin takeoff when the thrust for each of its two engines... Problem 50TS: Alex, who has a mass of 100kg, is skateboarding at 9.0m/swhen he smacks into a brick wall and comes... Problem 51TS: A boxer punches a sheet of paper and mid-air brings it from rest to a speed of 25m/sin0.05s. If the... Problem 52TS: Suppose that you are standing on a skateboard near wall and you push on the wall with a force of30N.... Problem 53TS: If raindrops fall vertically at a speed of 3m/sand you are running horizontally at 4m/s, show that... Problem 54TS: Horizontal forces of 3N and 4N act at right angles on a block of mass 5kg. Show that the resulting... Problem 55TS: An aeroplane with a speed of 120km/h encounters a 90km/h crosswind. Show the planes ground speed is... Problem 56TE: In the orbiting Space Shuttle, you are handed two identical closed boxes, one filled with sand and... Problem 57TE: Your empty hand is not hurt when it bang lightly against the wall. Why does it hurt if it is... Problem 58TE: On a long alley, a bowling ball slows down as it rolls. Is any horizontal force acting on the ball?... Problem 59TE: If a motorcycle moves with constant velocity, can you conclude that there is no net force acting on... Problem 60TE: Since an object weighs less on the surface of Moon than on Earths surface, does it have less inertia... Problem 61TE: Does the mass of an astronaut change when he or she is visiting the International Space Station?... Problem 62TE: Why is a massive cleaver more effective for chopping vegetables than an equally sharp knife? Problem 63TE: Neglecting air resistance, if you drop an object, its acceleration toward the ground is10m/s2 . If... Problem 64TE: Can you think of a reason why the acceleration of the object thrown downward through the air in... Problem 65TE: A feather and coin accelerate equally when dropped in a vacuum. If the feather were made of lead,... Problem 66TE: On which of these hills does the ball roll down with increasing speed and decreasing acceleration... Problem 67TE: At what stage in a parachute jump are velocity and acceleration in opposite directions? At what... Problem 68TE: How does the weight of falling body cmpare with the air resistance it encounters just before it... Problem 69TE: Free fall is a motion in which gravity is the only force acting. a Is a skydiver who has reached... Problem 70TE: Why is it that a cat that falls from the top of a 50-story building will hit the safety net below no... Problem 71TE: You tell your friend that the acceleration of a skydiver before the chute opens decreases as falling... Problem 72TE: First we say that force is push or pull. Now we say a force is part of an interaction. Is a force a... Problem 73TE: We know that the Sun pulls on the planets. Does it follow that the planets also pull on the Sun? Problem 74TE: A friend says that Al cannot push on the tree unless the tree pushes back on her. Another friend... Problem 75TE: When you stand at rest on a floor, does the floor exert an upward force on you? How much force does... Problem 76TE: When you pull on a rope, what pulls on you? If the rope breaks, does it still pull on you? Problem 77TE: The strong man will push apart the two initially stationary freight cars of equal mass before he... Problem 78TE: Consider that two carts, one twice as massive as the other, fly apart when the compressed spring is... Problem 79TE: When the athlete pushes upward to hold the barbell at rest, the reaction force is the weight of the... Problem 80TE: Note the two forces acting on the man standing at rest. One is due to the gravitational force of... Problem 81TE: Regarding the orange-apple system discussed in the chapter, would the apple be able to exert a force... Problem 82TE: The photo shows Steve Hewitt and his daughter Gretchen. Is Gretchen touching her dad or is he... Problem 83TE: Nellie tosses a ball at an angle upward. What happens to the vertical component of the balls... Problem 84TE: A block is at rest in positions A, B and C. The push by the stick and pull by the string are almost,... Problem 85TE: Which is more likely to break - the rope supporting a hammock stretched tightly between a pair of... Problem 86TE: Refer to Monkey Mo in Figure 3.32. If the rope makes an angle of 45 with the vertical, how will the... Problem 87TE: Refer to Monkey Mo in Figure 3.32. What will be the magnitude of vector S if the rope that supports... Problem 88TE: You exert a force on the ball when you toss it upward. How long does that force lasts after the ball... Problem 89TE: Why does a rocket become progressively easier to accelerate as it travels through space? Hint: About... Problem 90TE: Which team wins in a tug-of-war: the team that pulls harder on the rope or the team that pushes... Problem 91TDI: A boulder dropped from the roof of your school falls much more quickly than a ping-pong ball. Didnt... Problem 92TDI: Your friend says that when you step off a table, the Earth moves to meet you up. Discuss whether or... Problem 93TDI: Is Newtons third law applied inappropriately by a friend who asserts that, when telling a lie,... Problem 94TDI: The auto in the sketch moves forward as the brakes are applied. Your friend says that during this... Problem 95TDI: Your instructor challenges you and your friend to each pull a pair of scales attached to the ends of... Problem 96TDI: Two 100N weights are attached to a spring scale as shown. Does the scale read 0100or200N or does it... Problem 97TDI: Each of the vertebrae forming your spine is separated from its neighbours by disc of elastic... Problem 98TDI: A common saying is, Its not the fall that hurts you; its the sudden stop. Translate this statement... Problem 99TDI: Does a stick of dynamite contain force? Discuss and defend your answer. Problem 100TDI: Can a dog wag its tail without the tail in turn wagging the dog? Consider a dog with the relatively... Problem 101TDI: When air drag build up to equal the combined weight of Dick and Jane in their tandem skydive, a... Problem 102TDI: If you simultaneously drop a pair of tennis balls from the second story of a building, they will... Problem 103TDI: A friend says that if the acceleration of little Hudson Figure 3.33 at the top of his path were... Problem 104TDI: A boxer hits his equal-weight opponent with his most powerful punch. If the same punch is delivered... Problem 105TDI: Using Figure 3.14 as a guide, do you agree with the friend who reasons that a boxer should be able... Problem 1RAT: If an object moves along a curved path, then it must be aaccelerating bacted on by a force cboth of... Problem 2RAT: As mass is added to a car pushed by a constant force, its acceleration aincreases bdecreases... Problem 3RAT: A ball rolls down a curved ramp as shown. As its speed increases, its rate of gaining speed... Problem 4RAT: A heavy rock and a light rock in a free fall zero air resistance have the same acceleration. The... Problem 5RAT: You drop a pillow off the edge of the tallest building on your campus. While the pillow falls, its... Problem 6RAT: A karate chop delivers a force of 3000 N to a board that breaks. The force that the board exerts on... Problem 7RAT: Two parachutists, a heavy person and a light person, jumping from the same altitude have the same... Problem 8RAT: The amount of air resistance that acts on a wingsuit flyer and a flying squirrel depends on the... Problem 9RAT: When you push an ice cube with a 0.5_N force, the ice cube aaccelerates at 10 m/s2 bresist being... Problem 10RAT: The force that propels a rocket is provided by: agravity bNewtons law of motion cits exhaust gases... format_list_bulleted