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HMS, BM EQ-Bank 959 MC

In tennis, when a player hits a topspin forehand, the ball curves downward during flight due to:

  1. Increased air density above the ball
  2. Gravitational forces acting more strongly on the spinning ball
  3. Reduced air pressure caused by the racquet's follow-through
  4. Magnus force created by the ball's rotation through air
Show Answers Only

\(D\)

Show Worked Solution
  • D is correct: Magnus force is created when a spinning object moves through fluid (air), causing pressure differences that curve the ball’s path.

Other Options:

  • A is incorrect: Air density remains constant; pressure differences are created by spin.
  • B is incorrect: Gravity acts equally on all objects regardless of spin.
  • C is incorrect: Racquet follow-through doesn’t create lasting pressure changes affecting ball flight.