PROJECTILE MOTION Projectile Motion Projectile an object that
PROJECTILE MOTION
Projectile Motion Projectile = an object that moves along a twodimensional curved trajectory in response to gravity Projectile Motion = the motion of a projectile under gravity Time of Flight = the time taken for a projectile to complete its motion Range = the horizontal distance travelled by a projectile (∆dx)
Dropping vs. Throwing
Important Properties of Projectile Motion 1. Objects fall at the same rate, regardless if dropped or thrown 2. Projectiles have no acceleration horizontally horizontal : a = 0 vertical : a = 9. 8 m/s 2 3. Projectiles follow parabolic motion 4. At the vertex the vertical velocity is 0 m/s
Example 1: A circus clown is shot at 40. 0 m/s horizontally out of a canon from the top of a 100. 0 m high cliff. a) How long is he in the air? (flight time) b) How far from the base of the cliff will he land? (range)
Try #1 on page 78
Example 2: A circus clown is shot out of a cannon on the ground at an angle of 40˚ above the horizontal and at 9. 4 m/s. Determine his a) Time of flight b) Range c) Max. height
Example 3: The same clown is now shot from a cannon at 25 m/s and 50˚ above the horizontal. This time, the cannon is on top of a 30. 0 m high cliff. What is the clown’s a) Time of flight b) Range c) Final velocity before hitting the ground
Try Page 81: #2, 6, 7, 8
- Slides: 9