**Evans SPH 3U1**

**Physics Grade
11**

**Unit 1: Kinematics**

**Note 7: Projectile Motion**

Reference: Chapter 2.3

**Parabolic and Projectile
Motion:**

Demonstrate Timing - If a ball is thrown horizontally, it will stay in the air for exactly the same length of time as a ball dropped from the same height no matter how fast you throw it.

Discuss pg. 84 #1-3

Demo car with popping ball

**Projectile Motion** – In projectile motion an object
really has 2 motions taking place simultaneously. These motions can be treated
separately. The only thing that these motions have in common is that they occur
in the same time interval. For ideal projectile motion conditions (absence of a
resisting force), the vertical motion is uniformly accelerated motion ( i.e.
free fall). The horizontal motion is simply uniform motion.

- Use equation

- Use component method of adding vectors.

- May need to use quadratic formula or factoring to solve for time.

- Substitute time back in to find horizontal distance travelled (horizontal range).

An object traveling at 3.0 m/s [forward] along a flat friction reduced table top rolls off the table. Assume that the height of the table is 4.0m. Calculate:

a)

b)

c) the impact velocity

a)

c) horizontal range (Answer: 4.9 x 10

d) impact velocity

a) time of flight

b) horizontal range

c) maximum height reached

d) impact velocity

Pg 81 #1,2 (Practice questions)

Pg 81 #1-8