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Unformatted text preview: least speed the ball will have during its flight if is chosen such that the flight time is 0.800 t max ? When the ball comes back to the ground level, the vertical displacement is zero. The flight time is 0 = v sin t-(1/2)gt 2 t = 2v sin /g Since the sine function takes its maximum value (= 1) when is 90. Thus the maximum flight time is t max = 2v /g Since we have to choose the projectile angle so that t = 0.8t max , the angle is 2v sin /g = 0.8(2v /g) sin = 0.8 = 53.1 The speed of the ball is minimum at the peak of the projectile motion, where y component of the velocity is zero. Therefore, the least speed is v min = v 0x = v cos = 32.5 m/s...
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This note was uploaded on 01/25/2011 for the course PHY 2048 taught by Professor Field during the Summer '08 term at University of Florida.
- Summer '08