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Physics WS13

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PHYSICS WORKSHEET #13: MIXED PROJECTILE MOTION PROBLEMS
1. A horizontal rifle is fired at a bull’s eye. The muzzle speed of the bullet is 760 m/s. The barrel is pointed directly at the
center of the bull’s eye, but the bullet strikes the target 0.025 m below the center. What is the horizontal distance between the
end of the rifle and the bull’s eye? (54 m)
2. A golfer imparts a 30.3 m/s speed to a ball, shooting it at an angle of 20.0° off of a 14.5 m high cliff. How far will the ball
travel outward from where it was hit? (87.5 m)
3. A rock climber tosses a small first aid kit to another climber who is 4.0-m higher up the mountain. The initial velocity of
the kit is 11 m/s at an angle of 65° above the horizontal.
a) For how many seconds is the first aid kit in the air? You may assume that the kit is caught on the downward part of its arc.
(1.49 s)
b) What was the range of the toss? (6.9 m)
4. A tennis ball is struck such that it leaves the racket horizontally with a speed of 28.0 m/s. The ball hits the court at a
horizontal distance of 19.6 m from the racket. What is the height of the tennis ball when it leaves the racket? (2.40 m)
5. A projectile has a launching angle of 52.0° above the horizontal and an initial speed of 18.0 m/s. What is the highest
barrier that the projectile can clear? (10.3 m)
6. A soccer ball is kicked down a field at a velocity of 12.5 m/s at an angle of 32.0° above the horizontal. How long will it be
in the air? How far will it travel? What will its maximum altitude be? (2.24 m)
7. A person standing at the top of a 10.0-m tall cliff throws two stones with identical initial speeds of 13.0 m/s. One stone is
thrown upward at an angle of 30.0° above the horizontal. The other is thrown downward at an angle of 30.0° below the
horizontal. How far apart will the stones land? (14.9 m)
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