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Chapter 1: Q13CP (page 23)

A comet travels in an elliptical path around a star, in the direction shown in Figure 1.41. Which arrow best indicates the direction of the comet鈥檚 instantaneous velocity vector at each of the numbered locations in the orbit?

Short Answer

Expert verified

Direction of instantaneous velocity:

Location: Arrow a

Location: Arrow h

Location: Arrow g

Location: Arrow f

Location: Arrow e

Step by step solution

01

Definition of Direction of instantaneous velocity

At any moment in time, the direction of instantaneous velocity determines the direction of motion of a particle.It is always tangent to the path of the object.

02

Direction of instantaneous velocity

Going by the definition, the arrows that match with the direction of motion are:

Location: In this case, the direction of motion is towards north. The arrow which indicates the direction of motion properly is Arrow 鈥榓鈥�.

Location: In this case, the direction of motion is in north east direction. The arrow which indicates the direction of motion properly is Arrow 鈥榟鈥�.

Location: In this case, the direction of motion is towards west. The arrow which indicates the direction of motion properly is Arrow 鈥榞鈥�.

Location: In this case, the direction of motion is in south west direction. The arrow which indicates the direction of motion properly is Arrow 鈥榝鈥�.

Location: In this case, the direction of motion is towards south. The arrow which indicates the direction of motion properly is Arrow 鈥榚鈥�.

Thus, the direction of instantaneous velocity at each location have been found.

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Most popular questions from this chapter

Question: In the periodic table on the inside front cover of this book (or one you find on the internet), for each element there is given the "atomic number," the number of protons or electrons in an atom, and the "atomic mass," which is essentially the number of nucleons, protons plus neutrons, in the nucleus, averaged over the various isotopes of the element, which differ in the number of neutrons. Make a graph of the number of neutrons vs. the number of protons in the elements. You needn't graph every element, just enough to see the trend. What do you observe about the data? (This reflects the need for more neutrons in proton-rich nuclei in order to prevent the electric repulsion of the protons of each other from destroying the nucleus.)

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9 An ice hockey puck of mass 170 g enters the goal with a momentum of 鉄�0, 0, 鈭�6.3鉄� kg m/s, crossing the goal line at location 鉄�0, 0,鈭�26鉄� m relative to an origin in the center of the rink. The puck had been hit by a player 0.4 s before reaching the goal. What was the location of the puck when it was hit by the player, assuming negligible friction between the puck and the ice? (Note that the ice surface lies in the xz plane.)

At a certain instant, a ball passes location (7,21,-17)m.In the next 3s,the ball鈥檚 average velocity is(-11,42,-11)m/s. At the end of this 3s time interval, what is the height y of the ball?
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