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Chapter 1: Q14DQ (page 424)

Discuss whether this statement is correct: 鈥淚n the absence of air resistance, the trajectory of a projectile thrown near the earth鈥檚 surface is an ellipse, not a parabola.鈥�

Short Answer

Expert verified

The given statement is absolutely correct.

Step by step solution

01

Definition of the projectile

A projectile is described as an object that is propelled with the application of a particular external force and moves freely under the gravity and also the air resistance.

02

Determination of the correctness of the statement

In the absence of the air drag, the only force acting on the body is the earth鈥檚 gravity, which is a conservative force. Thus, the net work done in the motion of the projectile should be zero. This is exactly the case for an elliptical orbit. Don鈥檛 forget circle is also a special kind of ellipse, with the equal major and minor axis.

Thus, the statement is correct.

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