Conceptual Physical Science (6th Edition)
6th Edition
ISBN: 9780134060491
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 91E
When your car moves along the highway at constant velocity, the net force on it is zero. Why, then, do you continue running your engine?
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Chapter 2 Solutions
Conceptual Physical Science (6th Edition)
Ch. 2 - State the law of inertia.Ch. 2 - Is inertia a property of matter or a force of some...Ch. 2 - What concept was missing from people's minds in...Ch. 2 - When a bird lets go of a branch and drops to the...Ch. 2 - What kind of path would the planets follow if...Ch. 2 - State Newton's second law.Ch. 2 - Is acceleration directly or inversely proportional...Ch. 2 - Is acceleration directly or inversely proportional...Ch. 2 - If the mass of a sliding block is tripled at the...Ch. 2 - What is the net force that acts on a 10-N freely...
Ch. 2 - Why doesnt a heavy object accelerate more than a...Ch. 2 - What is the net force that acts on a 10-N falling...Ch. 2 - What two principal factors affect the force of air...Ch. 2 - What is the acceleration of a falling object that...Ch. 2 - If two objects of the same size fall through air...Ch. 2 - Why does a heavy parachutist fall faster than a...Ch. 2 - Earlier in this chapter, we treated force as a...Ch. 2 - How many forces are required for a single...Ch. 2 - When you push against a wall with your fingers,...Ch. 2 - A boxer can hit a heavy bag with great force. Why...Ch. 2 - State Newtons third law.Ch. 2 - Consider hitting a baseball with a bat. If we call...Ch. 2 - If the force that acts on a cannonball and the...Ch. 2 - Is it correct to say that action and reaction...Ch. 2 - If body A and body B are both within a system, can...Ch. 2 - In terms of forces, what is necessary to...Ch. 2 - Identify the force that propels a rocket into...Ch. 2 - How does a helicopter get its lifting force?Ch. 2 - To what law of physics do we refer when we say you...Ch. 2 - Which of Newtons laws focuses on inertia? Which on...Ch. 2 - In Chapter 1 acceleration is defined as a = vt....Ch. 2 - In this chapter we learn that the cause of...Ch. 2 - Knowing that a 1-kg object weighs 10 N. confirm...Ch. 2 - A simple rearrangement of Newton's second law...Ch. 2 - A Honda Civic hybrid weighs about 2900 pounds,...Ch. 2 - When two horizontal forces are exerted on the car...Ch. 2 - A 12-kg astronaut recedes from her spacecraft by...Ch. 2 - Madison pushes with a 160-N horizontal force on a...Ch. 2 - Sophia pushes with a 40-N horizontal force on a...Ch. 2 - A business jet of mass 30,000 kg takes off when...Ch. 2 - A rocket of mass 100,000 kg undergoes an...Ch. 2 - Calculate the horizontal force that must be...Ch. 2 - Leroy, who has a mass of 100 kg, is skateboarding...Ch. 2 - For 3.0 s, Allison exerts a net force of 10.0 N on...Ch. 2 - The heavyweight boxing champion of the world...Ch. 2 - Suzie Skydiver with her parachute has a mass of 50...Ch. 2 - If you stand next to a wall on a frictionless...Ch. 2 - A force Facts in the forward direction on a cart...Ch. 2 - A firefighter of mass 80 leg slides down a...Ch. 2 - A rock bands tour bus, mass M, is accelerating...Ch. 2 - Boxes of various masses are on a friction-free...Ch. 2 - In cases A, B, and C, the crate is in equilibrium...Ch. 2 - Consider a 100-kg box of tools in the locations A,...Ch. 2 - Three parachutists, A, B, and C, have reached...Ch. 2 - The strong man is pulled in the three situations...Ch. 2 - The Moon travels in a nearly circular path around...Ch. 2 - To pull a wagon across a lawn at constant...Ch. 2 - Your empty hand is not hurt when it bangs lightly...Ch. 2 - Why is a massive cleaver more effective for...Ch. 2 - Aristotle claimed that the speed of a falling...Ch. 2 - What is the net force acting on a 1-kg ball in...Ch. 2 - As you leap upward from the ground, how does the...Ch. 2 - "It's not the fall that hurts you; it's the sudden...Ch. 2 - For each of the following interactions, identify...Ch. 2 - You hold an apple over your head. (a) Identify all...Ch. 2 - What is the net force on an apple that weighs 1 N...Ch. 2 - Why does a cat that falls from the top of a...Ch. 2 - Free fall is motion in which gravity is the only...Ch. 2 - How does the weight of a falling body compare with...Ch. 2 - You tell your friend that the acceleration of a...Ch. 2 - We know that Earth pulls on the Moon. Does it...Ch. 2 - A friend says that Al cannot push on the tree...Ch. 2 - Why can a boxer hit a heavy opponent harder for...Ch. 2 - When you stand on a floor, does the floor exert an...Ch. 2 - Why can you exert greater force on the pedals of a...Ch. 2 - The strong man will push apart the two initially...Ch. 2 - Suppose two carts, one twice as massive as the...Ch. 2 - Two 100-N weights are attached to a spring scale...Ch. 2 - Prob. 83ECh. 2 - When the athlete holds the barbell overhead, the...Ch. 2 - Consider the two forces acting on the person who...Ch. 2 - If a Mack truck and a motorcycle have a head-on...Ch. 2 - Two people of equal mass attempt a tug-of-war with...Ch. 2 - Suppose that one of the people in Exercise 87 has...Ch. 2 - Which team wins in a tug-of-war: the team that...Ch. 2 - The photo shows Steve Hewitt and his daughter...Ch. 2 - When your car moves along the highway at constant...Ch. 2 - The auto in the sketch moves forward as the brakes...Ch. 2 - A racing car travels along a straight raceway at a...Ch. 2 - If it were not for air resistance, would it be...Ch. 2 - When you toss a coin upward, what happens to its...Ch. 2 - Discuss whether or not a stick of dynamite...Ch. 2 - In an orbiting space craft, you are handed two...Ch. 2 - Each of the vertebrae forming your spine is...Ch. 2 - Before the time of Galileo and Newton, many...Ch. 2 - The opening photo in this chapter shows a favorite...Ch. 2 - Consider a ball at rest in the middle of a toy...Ch. 2 - If youre in a car at rest that gets hit from...Ch. 2 - Why do you lurch forward in a bus that suddenly...Ch. 2 - Suppose that youre in a moving car and the engine...Ch. 2 - A rocket becomes progressively easier to...Ch. 2 - If you drop an object, its acceleration toward the...Ch. 2 - Can you think of a reason why the acceleration of...Ch. 2 - You throw a ball straight upward. Compared with...Ch. 2 - A couple of your friends say that before a falling...Ch. 2 - How does the terminal speed of a parachutist...Ch. 2 - How does the gravitational force on a falling body...Ch. 2 - If and when Galileo dropped two balls from the top...Ch. 2 - This is a scenario common to many physics...Ch. 2 - A fanner urges his horse to pull a wagon. The...Ch. 2 - When Marie exerts a horizontal force of 200 N to...Ch. 2 - Two equal-mass blocks are connected by a length of...Ch. 2 - The bricks in this road were originally straight....Ch. 2 - Ken and Joanne are astronauts floating some...Ch. 2 - Can a clog wag its tail without the tail in turn...Ch. 2 - If you simultaneously drop a pair of tennis balls...Ch. 2 - If gravity between the Sun and Earth suddenly...Ch. 2 - A ball rolls down a curved ramp as shown. As its...Ch. 2 - A block of ice sliding without friction down an...Ch. 2 - The reason why a 10-kg rocks falls no faster than...Ch. 2 - As mass is added to a cart pushed by a constant...Ch. 2 - The amount of air resistance that acts on a...Ch. 2 - You drop a pillow off the edge of the...Ch. 2 - Alex pulls on the end of a spring attached to a...Ch. 2 - The amount of force with which a boxers punch...Ch. 2 - The force that propels a rocket is provided by (a)...
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