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Question 3

From Physics HL Paper 1A (May 2025, TZ2)

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  1. The diagram shows the path of a ball in the absence of air resistance. Q is the highest point of the ball's trajectory and a is the vertical acceleration at Q. At impact the velocity makes an angle θ to the horizontal.
Diagram illustrating the path of a ball, indicating the launch point, impact point, the highest point Q, the vertical acceleration 'a' at Q, and the angle 'θ' at impact.
Diagram illustrating the path of a ball, indicating the launch point, impact point, the highest point Q, the vertical acceleration 'a' at Q, and the angle 'θ' at impact.

Three statements about the actual motion of the ball when there is air resistance are:
I. Q is lower.
II. a remains the same.
III. θ increases.

Which statements are correct?

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