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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

(a) A unit vector lies in the xy plane, at an angle of 160掳from the +x axis with a positive y component. What is the unit vector? (It helps to draw a diagram). (b) A string runs up and to the left in the xy plane, making an angle of 40掳to the vertical. Determine the unit that points along the string.

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