• 1. A ball is tossed in the air at an angle.
  • a. What happens to the ball's vertical velocity while the ball is in the air?
  • b. What is its vertical velocity when it reaches the highest point?
  • c. What is the horizontal velocity when it reaches the highest point?
  • d. What is the acceleration when it reaches the highest point?
  • e. What is the acceleration just before it hits the ground?
  • f. Does the acceleration increase, decrease, or remain constant?
• 2. In a local bar, a customer slides an empty beer mug down the counter for a refill. The bartender is distracted and doesn't see the mug, which slides off the counter and strikes the floor. If the bar is 0.86m high and the mug was going 3.4m/s.
  • A. How long did it take the mug to reach the ground?
  • B. How far from the bar did it land?
• 3. A person standing at the edge of a seaside cliff kicks a stone horizontally. The ball's vertical speed just before landing was 30m/s and it hit the water 15m from the edge of the cliff.
  • a. How long did the ball take to hit the ground?
  • b. How fast was it going just after the kick?
• 4. An Alaskan rescue plane drops a package of emergency rations to a stranded party of explorers. The plane is traveling horizontally at 40m/s and is 100m above the ground.
  • a. How long does it take the package to reach the ground?
  • b. What is the horizontal velocity of the package just before it hits the ground?
  • c. What is the vertical velocity of the package just before it hits the ground?
  • d. Where is the plane when the package hits the ground?
  • e. Where will the package hit the ground relative to the point at which it was released?
• 5. A rifle is aimed horizontally at a target 30m away. The bullet hits the target 1.9cm below the aiming point. What are:
  • The bullet's time in flight?
  • The speed it emerges from the gun?
• 6. In a football game the kicker punts the ball downfield. The ball traveled 80m downfield in 5 seconds.
  • a. What was the initial vertical velocity of the ball?
  • b. What was the initial horizontal velocity of the ball?
• 7. A gun is fired with a horizontal speed of 400m/s and a vertical speed of 100m/s. The bullet lands at the same height it was shot.
• a. How long will it take to strike the ground?
• b. How far down field will the bullet be found?
• 8. A stone is catapulted across a level field with an initial horizontal velocity of 12m/s and an initial vertical velocity of 25m/s.
  • Where does the ball land (how far away from the starting point?
  • How high is the ball 2 seconds after launch?
  • How far from the starting position is the ball horizontally traveled after 2 seconds?
  • How fast is the ball going vertically after 2 seconds?
  • How fast is the ball going horizontally after 2 seconds?