Question

Question 9 (1 point) A ball is rolled across a table and flies off the end. At that point it becomes a projectile. Which statement is correct? 10 o The time of the flight is determined ONLY by the height of the table. O If you roll the ball faster, it will stay in the air longer. O If you roll the ball slower, with will travel further. 15 The distance of the flight is determined ONLY by the speed of the ball across the table. The height does not matter. se Save

Answer 1

False {The time of flight is determined only by height of the table. T_f = Time of flight T_f = 2 U sin theta/g So, T_f depends on velocity, angle and acceleration due to gravity True {If you roll the ball faster, it will stay in the air longer roll faster means more velocity (v) as T = U sin theta/g material implication directly proportional U so as U uparrow increases, T also increases False {If you roll the ball slower, with will travel further If we take Range, R = U^2 sin theta/g R directly proportional U^2 si if U decreases, R decreases Also h = U^2 sin^2 theta/2g material implication h directly proportional U^2 so if U decreases, h decreases False {The distance of the flight is determined only by speed of ball across the table The height does not matter Time of flight depends on speed.