15th Edition

ISBN: 9780077510534

Author: KRAUSKOPF

Publisher: Mcgraw-hill Higher Education (us)

Concept explainers

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!

Videos

Textbook Question

Chapter 2, Problem 66E

Two children wish to break a string. Are they more likely to succeed if each takes one end of the string and they pull against each other, or if they tie one end of the string to a tree and both pull on the free end? Why?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 2, Problem 65E

Chapter 2, Problem 67E

Students have asked these similar questions

two satellites are in circular orbits around the Earth. Satellite A is at an altitude equal to the Earth's radius, while satellite B is at an altitude equal to twice the Earth's radius. What is the ratio of their periods, Tb/Ta

Fresnel lens: You would like to design a 25 mm diameter blazed Fresnel zone plate with a first-order power of +1.5 diopters. What is the lithography requirement (resolution required) for making this lens that is designed for 550 nm? Express your answer in units of μm to one decimal point. Fresnel lens: What would the power of the first diffracted order of this lens be at wavelength of 400 nm? Express your answer in diopters to one decimal point. Eye: A person with myopic eyes has a far point of 15 cm. What power contact lenses does she need to correct her version to a standard far point at infinity? Give your answer in diopter to one decimal point.

Paraxial design of a field flattener. Imagine your optical system has Petzal curvature of the field with radius p. In Module 1 of Course 1, a homework problem asked you to derive the paraxial focus shift along the axis when a slab of glass was inserted in a converging cone of rays. Find or re-derive that result, then use it to calculate the paraxial radius of curvature of a field flattener of refractive index n that will correct the observed Petzval. Assume that the side of the flattener facing the image plane is plano. What is the required radius of the plano-convex field flattener? (p written as rho )

Chapter 2 Solutions

Physical Universe

Ch. 2 - Which of the following quantities is not a vector...Ch. 2 - Which of the following statements is incorrect? a....Ch. 2 - A box suspended by a rope is pulled to one side by...Ch. 2 - The sum of two vectors is a minimum when the angle...Ch. 2 - In which of the following examples is the motion...Ch. 2 - Two objects have the same size and shape but one...Ch. 2 - The acceleration of a stone thrown upward is a....Ch. 2 - You are riding a bicycle at constant speed when...Ch. 2 - When an object is accelerated, a. its direction...Ch. 2 - If we know the magnitude and direction of the net...

Ch. 2 - The weight of an object a. is the quantity of...Ch. 2 - Compared with her mass and weight on the earth, an...Ch. 2 - The earth and the moon exert equal and opposite...Ch. 2 - A car that is towing a trailer is accelerating on...Ch. 2 - When a boy pulls a cart, the force that causes him...Ch. 2 - In order to cause something to move in a circular...Ch. 2 - An object is moving in a circle with a constant...Ch. 2 - A car rounds a curve on a level road. The...Ch. 2 - The centripetal force that keeps the earth in its...Ch. 2 - The gravitational force with which the earth...Ch. 2 - The speed needed to put a satellite in orbit does...Ch. 2 - An astronaut inside an orbiting satellite feels...Ch. 2 - A bicycle travels 12 km in 40 min. Its average...Ch. 2 - Which one or more of the following sets of...Ch. 2 - An airplane whose airspeed is 200 km/h is flying...Ch. 2 - A ship travels 200 km to the south and then 400 km...Ch. 2 - How long does a car whose acceleration is 2 m/s2...Ch. 2 - A ball is thrown upward at a speed of 12 m/s. It...Ch. 2 - A car that starts from rest has a constant...Ch. 2 - A car traveling at 10 m/s begins to be accelerated...Ch. 2 - A car with its brakes applied has an acceleration...Ch. 2 - The distance the car in Multiple Choice 31 travels...Ch. 2 - A bottle falls from a blimp whose altitude is 1200...Ch. 2 - When a net force of 1 N acts on a 1-kg body, the...Ch. 2 - When a net force of 1 N acts on a 1-N body, the...Ch. 2 - A car whose mass is 1600 kg (including the driver)...Ch. 2 - A 300-g ball is struck with a bat with a force of...Ch. 2 - A bicycle and its rider together have a mass of 80...Ch. 2 - The weight of 400 g of onions is a. 0.041 N b. 0.4...Ch. 2 - A salami weighs 3 lb. Its mass is a. 0.31 kg b....Ch. 2 - An upward force of 600 N acts on a 50-kg...Ch. 2 - The upward force the rope of a hoist must exert to...Ch. 2 - The radius of the circle in which an object is...Ch. 2 - A car rounds a curve at 20 km/h. If it rounds the...Ch. 2 - A 1200-kg car whose speed is 6 m/s rounds a turn...Ch. 2 - If the earth were 3 times as far from the sun as...Ch. 2 - A woman whose mass is 60 kg on the earths surface...Ch. 2 - A man whose weight is 800 N on the earths surface...Ch. 2 - A woman standing before a cliff claps her hands,...Ch. 2 - The starter of a race stands at one end of a line...Ch. 2 - In 1977 Steve Weldon ate 91 m of spaghetti in 29...Ch. 2 - A snake is slithering toward you at 1.5 m/s. If...Ch. 2 - A woman jogs for 2 km at 8 km/h and then walks for...Ch. 2 - Three forces, each of 10 lb, act on the same...Ch. 2 - Is it correct to say that scalar quantities are...Ch. 2 - A man is rowing at 8 km/h in a river 1.5 km wide...Ch. 2 - A woman walks 70 m to an elevator and then rises...Ch. 2 - Two tugboats are towing a ship. Each exerts a...Ch. 2 - Can a rapidly moving object have the same...Ch. 2 - The acceleration of a certain moving object is...Ch. 2 - A car whose acceleration is constant reaches a...Ch. 2 - The brakes of a car are applied to give it an...Ch. 2 - A car starts from rest and reaches a speed of 40...Ch. 2 - The brakes of a car moving at 14 m/s are applied,...Ch. 2 - A car is moving at 10 m/s when it begins to be...Ch. 2 - The driver of a train moving at 20 m/s applies the...Ch. 2 - A car starts from rest and covers 400 m (very...Ch. 2 - Is it true that something dropped from rest falls...Ch. 2 - A rifle is aimed directly at a squirrel in a tree....Ch. 2 - The acceleration of gravity on the surface of...Ch. 2 - When a football is thrown, it follows a curved...Ch. 2 - A crate is dropped from an airplane flying...Ch. 2 - A stone is thrown horizontally from a cliff and...Ch. 2 - (a) Imagine that Charlotte drops a ball from a...Ch. 2 - A person in a stationary elevator drops a coin and...Ch. 2 - How fast must a ball be thrown upward to reach a...Ch. 2 - A person dives off the edge of a cliff 33 m above...Ch. 2 - A ball dropped from the roof of a building takes 4...Ch. 2 - A ball is thrown downward at 12 m/s. What is its...Ch. 2 - When will a stone thrown vertically upward at 9.8...Ch. 2 - A ball is thrown upward from the edge of a cliff...Ch. 2 - The air resistance experienced by a falling object...Ch. 2 - A ball is thrown vertically upward with an initial...Ch. 2 - A rifle is aimed directly at the bulls-eye of a...Ch. 2 - An airplane is in level flight at a speed of 100...Ch. 2 - A ball is thrown horizontally from the roof of a...Ch. 2 - A bullet is fired horizontally from a rifle at 200...Ch. 2 - An airplane whose speed is 60 m/s is flying at an...Ch. 2 - A person at the masthead of a sailboat moving at...Ch. 2 - Compare the tension in the coupling between the...Ch. 2 - In accelerating from a standing start to a speed...Ch. 2 - A 12,000-kg airplane launched by a catapult from...Ch. 2 - The brakes of a 1200-kg car exert a force of 4 kN....Ch. 2 - A force of 20 N gives an object an acceleration of...Ch. 2 - A bicycle and its rider together have a mass of 80...Ch. 2 - A 430-g soccer ball at rest on the ground is...Ch. 2 - A car and driver with a total mass of 1600 kg has...Ch. 2 - Before picking up the passengers, the driver of...Ch. 2 - Consider the statement: Sara weighs 55 kg. What is...Ch. 2 - When a force equal to its weight is applied to an...Ch. 2 - A person weighs 85 N on the surface of the moon...Ch. 2 - A mass of 8 kg and another of 12 kg are suspended...Ch. 2 - An 80-kg man slides down a rope at constant speed....Ch. 2 - How much force is needed to give a 5-kg box an...Ch. 2 - A parachutist whose total mass is 100 kg is...Ch. 2 - A person in an elevator suspends a 1-kg mass from...Ch. 2 - A person stands on a scale in an elevator. When...Ch. 2 - A 60-kg person stands on a scale in an elevator....Ch. 2 - Since the opposite forces of the third law of...Ch. 2 - What is the relationship, if any, between the...Ch. 2 - A book rests on a table. (a) What is the reaction...Ch. 2 - A car with its engine running and in forward gear...Ch. 2 - An engineer designs a propeller-driven spacecraft....Ch. 2 - Two children wish to break a string. Are they more...Ch. 2 - When a 5-kg rifle is fired, the 9-g bullet is...Ch. 2 - Where should you stand on the earths surface to...Ch. 2 - Under what circumstances, if any, can something...Ch. 2 - A person swings an iron ball in a vertical circle...Ch. 2 - A car makes a clockwise turn on a level road at...Ch. 2 - When you whirl a ball at the end of a string, the...Ch. 2 - A 40-kg crate is lying on the flat floor of a...Ch. 2 - The greatest force a level road can exert on the...Ch. 2 - Find the minimum radius at which an airplane...Ch. 2 - Some people believe that aliens from elsewhere in...Ch. 2 - The 200-g head of a golf club moves at 40 m/s in a...Ch. 2 - An airplane flying at a constant speed of 160 m/s...Ch. 2 - A track team on the moon could set new records for...Ch. 2 - If the moon were half as far from the earth as it...Ch. 2 - Compare the weight and mass of an object at the...Ch. 2 - A hole is bored to the center of the earth and a...Ch. 2 - Is the suns gravitational pull on the earth the...Ch. 2 - The centripetal force that keeps the moon in its...Ch. 2 - According to Keplers second law, the earth travels...Ch. 2 - A 2-kg mass is 1 m away from a 5-kg mass. What is...Ch. 2 - A dishonest grocer installs a 100-kg lead block...Ch. 2 - A bull and a cow elephant, each of mass 2000 kg,...Ch. 2 - An airplane makes a vertical circle in which it is...Ch. 2 - Two satellites are launched from Cape Canaveral...Ch. 2 - Is an astronaut in an orbiting spacecraft actually...Ch. 2 - With the help of the data in Table 17-1, find the...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Two children wish to break a string. Are they more likely to succeed if each takes one end of the string and they pull against each other, or if they tie one end of the string to a tree and both pull on the free end? Why?

Solution Summary: The author explains that the easiest way to break the string is to tie one end to a tree and both pull on the free end.

Concept explainers

Videos

Want to see the full answer?

Chapter 2 Solutions