A Levels Physics (9702)•9702/11/M/J/20

Explanation
Horizontal range in projectile motion Steps:
- Horizontal velocity is constant: V_x = V cos θ (no horizontal acceleration).
- Time of flight is T, so horizontal distance R = V_x × T.
- Vertical motion determines T but doesn't affect horizontal displacement.
- Thus, R = (V cos θ) T, matching option D.
Why D is correct:
- It follows the formula for range under constant horizontal velocity, R = V_x T.
Why the others are wrong:
- A: Omits time T, underestimating range unless T=1 (not general).
- B: Uses vertical velocity V sin θ and subtracts vertical displacement term, irrelevant for horizontal range.
- C: Applies vertical acceleration term to horizontal motion, which has no such effect.
Final answer: D
Topic: Equations of motion
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