Daily Olympiad: Physics - Momentum [20260511]

Challenge yourself with today's AP Physics practice! This test covers 'Momentum' for Physics (AP Physics - 12). Level: Hard | Duration: 45 mins.

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1. A 2000 kg car moving east at 10 m/s collides with a 1500 kg car moving north at 12 m/s. If they stick together after collision, what is the direction of their motion relative to east?

A. 43.2° north of east B. 33.7° north of east C. 50.2° north of east D. 28.6° north of east

Solution

Correct: A

Use conservation of momentum in x and y directions. p_x: (2000 kg)(10 m/s) = 20000 kg·m/s east. p_y: (1500 kg)(12 m/s) = 18000 kg·m/s north. Total mass = 3500 kg. v_x = 20000/3500 ≈ 5.71 m/s. v_y = 18000/3500 ≈ 5.14 m/s. θ = tan⁻¹(5.14/5.71) ≈ 43.2°.

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Daily Olympiad: Physics - Momentum [20260511]

1. A 2000 kg car moving east at 10 m/s collides with a 1500 kg car moving north at 12 m/s. If they stick together after collision, what is the direction of their motion relative to east?

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