Revision: ADVANCED PHYSICS – Projectile Motion Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. Advanced Physics: Projectile Motion - Revision Quiz Test your understanding of Advanced Physics: Projectile Motion here: 1 / 5 1) A package is released from a drone moving horizontally at 25 m s⁻¹, 80 m above level ground. Air resistance is negligible. In which direction is the package moving immediately before impact? 58º above the horizontal 58º below the horizontal Vertically downward 32º below the horizontal The fall time is 4.0 s, so the vertical impact component is 40 m s-1 downward while the horizontal component remains 25 m s-1. Thus tan angle = 40/25, giving 58º below the horizontal. 2 / 5 2) For a projectile moving without air resistance, which description of its graphs against time is correct while it is in flight? Horizontal displacement against time is a straight line, and vertical velocity against time is a straight line with gradient -g. Horizontal displacement against time curves upward, and vertical velocity against time is constant. Horizontal displacement against time is constant, and vertical velocity against time increases linearly. Both horizontal displacement against time and vertical velocity against time vary sinusoidally. With zero horizontal acceleration, horizontal displacement increases linearly with time. Constant downward acceleration makes vertical velocity decrease linearly with gradient -g. 3 / 5 3) A projectile is fired at an angle α to the horizontal at a speed u, as shown. What are the vertical and horizontal components of its velocity after a time t? Assume that air resistance is negligible. The acceleration of free fall is g. C B D A 4 / 5 4) A ball is launched from a platform 10 m above level ground at 20 m s⁻¹ and 30º above the horizontal. How far horizontally from the launch point does it land? 47.3 m 23.7 m 34.6 m 40.0 m Vertical motion gives -10 = 10t - 5t2, so the positive flight time is 2.73 s. The horizontal component is 20 cos 30 degrees = 17.3 m s-1, giving a range of 17.3(2.73) = 47.3 m. 5 / 5 5) When a ball is thrown upwards at an angle to the horizontal with an initial speed. Assuming that air resistance is not negligible, which of the following statement is incorrect? The path of the ball is asymmetrical about the highest point. The maximum height reached by the ball is smaller than the case with negligible air resistance. Horizontal range of the ball is shorter than the case with negligible air resistance. The time taken for the flight up to the highest point is longer than the time taken for the flight down. Your score is Restart quiz
