IB Physics HL A 1 9 Fluid Resistance on Projectiles Questions

Practise IB Physics HL A.1.9 by analysing speed-dependent resistance and its effect on trajectories and terminal motion.

Exam points

Describe the effects of fluid resistance on projectile trajectory, flight time, velocity, acceleration, range and terminal speed.
Explain how drag changes projectile motion and produces terminal speed using complete mark-scheme evidence.

[Maximum number: 2]

A football player kicks a stationary ball of mass 0.45 kg towards a wall. The initial speed of the ball after the kick is $19 \mathrm{~m} \mathrm{~s}^{-1}$ and the ball does not rotate. Air resistance is negligible and there is no wind.

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In practice, air resistance affects the ball. Outline the effect that air resistance has on the vertical acceleration of the ball. Take the direction of the acceleration due to gravity to be positive.

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IB Physics HL A 1 9 Fluid Resistance on Projectiles Questions question 1