Question

Despite a very strong wind, a tennis playermanages to hit a tennis ball with her racquetso that the ball passes over the net and landsin her opponents court.Consider the following forces:1 - A downward force of gravity.2 - A force by the "hit".3 - A force exerted by the air.Which of the above forces is (are) acting onthe tennis ball after it has left contact withthe racquet and before it touches the ground?1. 2 and 32. 1 only3. 1, 2 and 34. 1 and 25. 1 and 3

Answer 1

5. 1 and 3

Step-by-step explanation:

Once released from the racquet, in absence of any external forces, the ball must continue moving at its initial speed in a straight line forever, according to Newton's First Law, as the "hit"force is no longer present.

Anyway, there are two external forces that continue acting upon the ball before it touches the ground: one is gravity (according to Newton's Universal Law of Gravitation), and the other is the drag force due to the wind, exerted by the air.

So the right answer is 5. 1 and 3.