1. AP Physics C I.A.2 Motion in Two Dimensions

2. An object launched horizontally from a height

3. Ex. A rescue plan flies at 55.0 m/s at a constant elevation of 500.0 m toward a point directly over a boating accident and the victim struggling in the water. The pilot wants to release a bag of bricks disguised as a flotation device that will land very near the drowning sailor in the water. a) What is the time required to the bag to reach the water? b) At what horizontal distance from the victim, should the pilot release the bag so it land on the head of the victim? c) What is the final velocity of the bag immediately before it hits the water?

4. An object launched at an angle above the horizontal The components of velocity How they change with the projectile path The acceleration vector

5. Ex. A golfer chips a ball over a 3.00 m tree that is 14.0 m away. The ball lands at the same level from which it was struck at a horizontal distance of 17.8. a) If the ball left the club at an angle of 54.0º above the horizontal and landed 2.24 s later, what was its initial velocity? b) By what height does the ball clear the tree?

6. Ex. A soccer ball is kicked with a speed of 9.85 m/s at an angle of 35.0º above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air?

7. Ex. A snowball is thrown with a speed of 13 m/s from a roof 7.0 m above the ground at an angle of 25º a above the horizontal. What is the speed of the snowball as it hits the ground?

8. p. 78: 67-70 67. a) 49 sb) 12 kmc) ? 68. a) 2300 mb) 43 sc) 9030 m 69. a) 8.2 m/sb) 23 m/s 70. 420 m