Projectile Motion Practice

Horizontally Launched:

1. In the movie Thelma and Louise, the two actresses drove off a cliff at the end. In preparation for the scene, their stunt doubles determined that the cliff was 50.0 m high. The director wants the car to land 90.0 m from the base of the cliff close to the camera location. How fast must the car be travelling in order to land at this location? (28 m/s)

2. An airplane loaded with flame retardant travels horizontally at 55.5m/s. The altimeter indicates that the plane is 180. m above the ground. The pilot wants to know how far in advance (how far horizontally) of the fire to release the retardant. (336.2 m/s)

HW_ANSThursday, October 14, 20101:46 PM

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3. During the Canadian Amateur Open Tennis Match, Eli serves the ball with a horizontal velocity of 23.6 m/s 2.37 m above the court surface. By how much does the ball clear the net which is 12.0 m away and 0.900 m high? (clears by about 0.204 m)

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4. Hank (Henry) Aaron hits a baseball 1.10 m off the ground. The ball leaves his bat with a velocity of 40.0 m/s horizontally. How far from home base will the ball land if the shortstop misses the ball? (18.94 m)

1. Luca Congi of the 2007 Grey Cup Champions Saskatchewan Roughriders kicks the football with an initial speed of 19.5m/s 45.0° above the ground. D.J. Flick, standing on the goal line 54.8 m away in the direction of the kick, starts running to meet the ball the instant it is kicked.. Neglecting air resistance, how fast does he have to run in order to catch the ball just before it hits the ground? (5.786 m/s)

Launched at an Angle:

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2. Reika kicks the soccer ball with a velocity of 15 m/s 38° above the horizontal. a) how long will the ball be in the air? b) how far downfield will it land? c) how high did the ball go? (1.883 s, 4.334 m, 22.257 m)

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