A quadcopter of mass is moving horizontally when its rotors suddenly tilt

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A quadcopter of mass 2.0 kg2.0\,\text{kg} is moving horizontally when its rotors suddenly tilt, producing a single thrust force of magnitude 25 N25\,\text{N} directed 30∘30^{\circ} above the horizontal. Air resistance is negligible. Which set of accelerations most nearly describes the quadcopter immediately after the rotors tilt? (Positive yy is upward.) (a) ax≈13 m/s2a_x \approx 13\,\text{m/s}^2 to the right, ay≈−9.8 m/s2a_y \approx -9.8\,\text{m/s}^2 (b) ax≈6.3 m/s2a_x \approx 6.3\,\text{m/s}^2 to the right, ay≈+1.0 m/s2a_y \approx +1.0\,\text{m/s}^2 (c) ax≈11 m/s2a_x \approx 11\,\text{m/s}^2 to the right, ay≈−3.6 m/s2a_y \approx -3.6\,\text{m/s}^2 (d) ax≈11 m/s2a_x \approx 11\,\text{m/s}^2 to the right, ay≈+3.6 m/s2a_y \approx +3.6\,\text{m/s}^2

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