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Chapter 11: Q1Q (page 458)

Give an example of a situation in which an object is traveling a straight line, yet has non-zero angular momentum.

Short Answer

Expert verified

The angular momentum of the spacecraft relative to the asteroid has non-zero value.

Step by step solution

01

Definition of Angular Momentum

The angular momentum is a characteristic that describes an object or a system of items' rotational inertia in motion around an axis that may or may not pass through the object or system.

02

The example of a situation is-

A straight-moving spaceship passing an asteroid is an example of an object moving in a straight line with angular momentum greater than zero.

The situation is shown in the following figure.

Hence, the angular momentum of the spacecraft relative to the asteroid has non-zero value.

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Most popular questions from this chapter

A disk of radius 0.2 mand moment of inertia 1.5 kg路m2 is mounted on a nearly frictionless axle (Figure 11.106). A string is wrapped tightly around the disk, and you pull on the string with a constant force of 25 N. After a while the disk has reached an angular speed of2rad/s.What is its angular speed 0.1seconds later? Explain briefly.

Pinocchio rides a horse on a merry-go-round turning counterclockwise as viewed from above, with his long nose always pointing forwards, in the direction of his velocity. Is Pinocchio鈥檚 translational angular momentum relative to the center of the merry-go-round zero or nonzero? In nonzero, what is its direction? Is his rational angular momentum zero or nonzero? If nonzero, what is its direction?

A diver dives from a high platform (Figure 11.100). When he leaves the platform, he tucks tightly and performs three complete revolutions in the air, then straightens out with his body fully extended before entering the water. He is in the air for a total time of1.4 s.What is his angular speed 蝇 just as he enters the water? Give a numerical answer. Be explicit about the details of your model, and include (brief) explanations. You will need to estimate some quantities.

The axis of gyroscope is tilted at an angle of 30鈭�to the vertical (figure 11.110). The rotor has a radius of 15cm , mass 3kg , moment of inertia is 0.06Kg/m2and spins on its axis at 30rad/s. It is supported in a cage (not shown) in such a way that without an added weigh it does not process. Then a mass of 0.2 kg is hung from the axis at a distance of 18 cm from the center of the rotor.

a. Viewed from above, does the gyroscope process in a (1) clockwise or a (2) counterclockwise direction? That is, does the top end of the axis move (1) out of the page or (2) into the page in the next instant? Explain your reasoning

b. How long does it take for the gyroscope to make one complete procession?

What are the units of moment of inertia? Of angular speed 蝇? Of angular momentum? Of linear momentum?
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