Projectile Motion Worksheet 2 1. A ball is kicked horizontally off a 80 meter high cliff at an initial velocity of 8 m/s. How far from the base of the cliff does the ball land? 2. A cannon is fired at an angle of 30 degrees below the horizontal from the top of a 150 meter cliff at an initial velocity of 800 m/s. A) How long will it take the shell to reach the ground? B) Draw a rough graph of the object’s vertical and horizontal velocities. 3. A baseball player throws a baseball with a velocity of 25 m/s into the air at an unknown angle. A) If the horizontal velocity of the ball is 18 m/s, what angle was the ball thrown at? B) If it takes the ball 3 seconds to hit the ground, how far does it travel? 4. An egg is thrown horizontally off the roof of a 60 meter high apartment building with an initial velocity of 6.5 m/s. How long does it take the egg to hit the ground and how far does it move in the x-direction? (Questions 5 - 8) Jim and Sara stand at the edge of a 50 m high cliff on the moon. Jim extends his arm over the cliff edge and throws a ball straight up with an initial speed of 20 m/s. Sara throws an identical ball with the same initial speed, but she throws the ball at a 30 degree angle above the horizontal. 5. Consider each ball at the highest point in its flight. At this point: A) Which ball has the greater vertical velocity? Choose your answer and explain briefly. B) Which ball has the greater horizontal velocity? Choose your answer and explain briefly. 6. Now consider each ball just before it hits the ground, 50 m below where the balls were initially released. At this point which ball has the greater vertical velocity? Choose your answer and explain briefly. 7. Which ball reaches the peak of its flight more quickly after being thrown? Choose your answer and explain briefly. 8. Below is a velocity-time graph representing the vertical velocity of Sara's ball. On the same axes, sketch a velocity-time graph representing the vertical velocity of Jim's ball.
