CONCEPTUAL PHYSICS-W/PRACTICING PHYSICS9th EditionHewitt Publisher: PEARSONISBN: 9780321052025
CONCEPTUAL PHYSICS-W/PRACTICING PHYSICS
FREE Answers for CONCEPTUAL PHYSICS-W/PRACTICING PHYSICS
Problem 1A:
What produces acceleration?Problem 2A:
In Chapter 4 we defined acceleration as the time rate of change of velocity. What other equation for...Problem 4A:
If two quantities are inversely proportional to each other, does that mean as one increases the...Problem 5A:
If the net force acting on a sliding block is tripled, what happens to the acceleration?Problem 6A:
If the mass of a sliding block is tripled at the same time the net force on it is tripled, how does...Problem 7A:
Motion is affected by solid objects in contact. In what other situations does friction affect...Problem 8A:
Suppose you exert a horizontal push on a crate that rests on a level floor, and it doesnt move. How...Problem 9A:
How great is the air resistance that acts on a 10-N sack that falls in air at constant velocity?Problem 10A:
Distinguish between force and pressure.Problem 13A:
What is meant by freefall?Problem 14A:
The ratio of circumference/diameter for all circles is . What is the ratio of force/mass for all...Problem 15A:
Why doesnt a heavy object accelerate more than a light object when both are freely falling?Problem 16A:
Does air resistance on a falling object increase or does it decrease with increasing speed?Problem 17A:
If two objects of the same size fall through air at different speeds, which encounters the greater...Problem 20A:
How much air resistance acts on a falling 100-N box of nails when it reaches terminal velocity?Problem 21A:
Each diagram shows a ball traveling from left to right. The position of the ball each second is...Problem 22A:
Boxes of various masses are on a friction-free level table. Rank each of the following from greatest...Problem 23A:
Each block on the friction-free lab bench is connected by a string and pulled by a second falling...Problem 25A:
Calculate the acceleration of a 40-kg crate of softball gear when pulled sideways with net force of...Problem 26A:
Calculate the acceleration of a 2000-kg, single-engine airplane as it begins its takeoff with an...Problem 27A:
Calculate the acceleration of a 300,000-kg jumbo jet just before takeoff when the thrust for each of...Problem 28A:
Calculate the acceleration if you push with a 20-N horizontal force against a 2-kg block on a...Problem 29A:
Calculate the horizontal force that must be applied to a 1-kg puck to make it accelerate on a...Problem 30A:
Calculate the horizontal force that must be applied to produce an acceleration of 1.8g for a 1.2-kg...Problem 31A:
If you push horizontally on your book with a force of 1 N to make the book slide at constant...Problem 32A:
Terry says that if an object has no acceleration, then no forces are exerted on it. Sherry doesnt...Problem 33A:
When a car is moving in reverse, backing from a driveway, the driver applies the brakes. In what...Problem 34A:
The auto in the sketch moves forward as the brakes are applied. A bystander says that during the...Problem 35A:
What is the difference between saying that one quantity is proportional to another and saying it is...Problem 36A:
What is the acceleration of a rock at the top of its trajectory when thrown straight upward? Explain...Problem 37A:
When blocking in football, why does a defending lineman often attempt to get his body under that of...Problem 38A:
An aircraft gains speed during takeoff due to the constant thrust of its engines. When is the...Problem 39A:
A rocket becomes progressively easier to accelerate as it travels through outer space. Why is this...Problem 40A:
A common saying goes, 'Its not the fall that hurts you; its the sudden stop.' Translate this into...Problem 41A:
On which of these hills does the ball roll down with increasing speed and decreasing acceleration...Problem 42A:
Why does a sharp knife cut better than a dull knife?Problem 43A:
When Helen lifts one foot and remains standing on a bathroom scale, pressure on the scale is...Problem 44A:
Aristotle claimed the speed of a falling object depends on its weight. We now know that objects in...Problem 45A:
After learning why objects of different mass have the same acceleration in free fall, Erik wonders...Problem 46A:
In a vacuum, a coin and a feather fall side by side. Would it be correct to say that in a vacuum...Problem 47A:
As a sky diver falls faster and faster through the air (before reaching terminal speed), does the...Problem 48A:
After she jumps, a sky diver reaches terminal speed after 10 seconds. Does she gain more speed...Problem 49A:
Can you think of a reason why the acceleration of an object thrown downward through the air would...Problem 50A:
How does the weight of a falling body compare with the air resistance it encounters just before it...Problem 51A:
Why does a cat that falls from a 50-story building hit the safety net with no more speed than if it...Problem 52A:
A regular tennis ball and another one filled with sand are dropped at the same time from the top of...Problem 53A:
If you drop an object, its acceleration toward the ground is 10m/s2. If you throw it downward...Problem 54A:
Suzy Skydiver, who has mass m, steps from the basket of a high-flying balloon of mass M and does a...Problem 55A:
What is the acceleration during takeoff of a jumbo jet with a mass of 30,000 kg when the thrust for...Problem 56A:
A net force on a 2-kg cart accelerates the cart at 3m/s2. How much acceleration will the same net...Problem 57A:
A net force of 10.0 N is exerted by Irene on a 6.7-kg cart for 3.0 seconds. Show that the cart will...Problem 58A:
Toby Toobad, who has a mass of 100 kg, is skateboarding at 9.0 m/s when he smacks into a brick wall...Problem 59A:
A net force of 10.0 N on a box of plastic foam causes it to accelerate at 2.0m/s2. Show that the...Problem 60A:
Austins truck has a mass of 2000 kg. When traveling at 22.0 m/s, it brakes to a stop in 4.0 s. Show...Problem 61A:
If a loaded truck that can accelerate at 1m/s2 loses its load and has three-fourths of its original...Problem 62A:
An occupant of a car can survive a crash if the deceleration during the crash is less than 30g....Problem 63A:
What is the pressure on a table when a 20-N book with a 0.05-m2 cover lies flat on it? What is the...Problem 64A:
A falling 50-kg parachutist experiences an upward acceleration of 6.2m/s2 when she opens her...Problem 65A:
A 10-kg mass on a horizontal friction-free air track is accelerated by a string attached to another...Problem 66A:
Suppose the masses described in problem 65 are 1 kg and 100 kg, respectively. Compare the...Problem 67A:
Skelly the skater is propelled by rocket power. Skelly and the rocket together have a mass of 25 kg....Problem 68A:
Drop a sheet of paper and a coin at the same time. Which reaches the ground first? Why? Now crumple...Problem 69A:
Glue a penny to a string. When in a moving automobile, hang the string and penny out a window. Tt...New
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Browse All Chapters of This Textbook
Chapter 1 - About ScienceChapter 2 - Mechanical EquilibriumChapter 3 - Newton's First Law Of Motion-interiaChapter 4 - Linear MotionChapter 5 - Projectile MotionChapter 6 - Newton's Second Law Of Motion-force And AccelerationChapter 7 - Newton's Third Law Of Motion- Action And ReactionChapter 8 - MomentumChapter 9 - EnergyChapter 10 - Circular Motion
Chapter 11 - Rotational EquilibriumChapter 12 - Rotational MotionChapter 13 - Universal GravitationChapter 14 - Satellite MotionChapter 15 - Special Relativity-space And TimeChapter 16 - Relativity-momentum, Mass, Energy, And GravityChapter 17 - The Atomic Nature Of MatterChapter 18 - SolidsChapter 19 - LiquidsChapter 20 - GasesChapter 21 - Temerpature Heat, And ExpansionChapter 22 - Heat TranferChapter 23 - Change Of PhaseChapter 24 - ThermodynamicsChapter 25 - Vibrations And WavesChapter 26 - SoundChapter 27 - LightChapter 28 - ColorChapter 29 - Reflection And RefractionChapter 30 - LensesChapter 31 - Diffractioon And InterferenceChapter 32 - ElectrostaticsChapter 33 - Electric Fileds And PotentialChapter 34 - Electric CurrentChapter 35 - Electric CircuitsChapter 36 - MagnetismChapter 37 - Electromagnetic InductionChapter 38 - The Atom And The QuantumChapter 39 - The Atomic Nucleus And RadioactivityChapter 40 - Nuclear Fission And Fusion
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