Question 2 (1 point) A hang glider is travelling horizontally at 14 m/s and is l

Question

Question 2 (1 point) A hang glider is travelling horizontally at 14 m/s and is located 325 m above the surface of the earth Suddenly and accidentally a water bottle fails from it travelled horlzontally when it hits the our Answen Question 3 (1 point) You decide to determine your friends pitching speed. You have her stand ona ledge 6.5 above the ground. She throws the ball the horiontally and it m away Find her pitching speed Question 4 (1 point) Tennis players aim to hit the bal horirontally during their serve. What ninimum speed is required for the ball to clear the 0.90 m net about 15.0 m from the serve if the ballis "launched" from a height of 2.1m Question 5 (1 point) For safety reasons, park rangers decide to tart an avalanche on a They fire an arbillery shell at an angle of 4° above the horicontal wilth an inial speed of 296 m/s Thirty seconds later they see the explosion What is the s coondinates of the shell where it explodes relative to the firing point stions (1 point) A soocer ball is kicked at an angle of 19 degrees. It lands on the ground 3 seconds later, 27 meters from it starting point What is the initial speed of the ball Question 7 (1 point) Juan throwsa speed of 47 m's at an angle of 41 above the horizontal. Richard the same height that an threw it How far did Juan throw the ball an initial catches the ball at Your Answer stion 8 (1 point) A ball is tossed from an upper story window of a building. The ball is given an initial velocity of 7.4 ms at an angle of 400 below the horizontal = strikes the ground 3,00 s later, Find the height from which the ball was thrown Question 9 (1 point) A basketball player who is 2.00 mtal standing on the floor 9 m from the basket. If he shoots the ball at a 48angle with the horizontal, what initial speed so that it gpes through the hoop without strking the blackboard. The basket height is 3.05m Question 10 (1 point) A ball rolls without slipping at 5 m/s off an incline ol 30 degrees The baill falls off the incline and

Explanation / Answer

From Conservation of Energy, the vertical velocity at the bottom will be:

vy = [2gh]1/2 = [2 x 9.8 x 325]1/2 = 79.812 m/s

since initial vertical velocity = uy = 0 m/s

t = vy/g = 79.812/9.8 = 8.144s

in this time, the horizontal distance traveled by the bottle will be:

D = uxt = 14 x 8.144 = 114.0175 m.

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