1. Homeroom

2. Warm-up OBJ/HW/WU on page 197 W/u: 1.A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s acceleration? 2.A force of 250 N is applied to an object that accelerates at a rate of 5 m/s². What is the mass of the object? 3.A train is accelerating at 2 m/s². If its initial velocity is 20 m/s, what is its final velocity after 30 seconds?

3. Mass How much matter an object has Weight is when we add in gravity

4. Objects In Motion Have Momentum Momentum: measure of mass in motion Momentum is a product of mass and velocity Ex. If a wrecking ball and a tennis ball are moving at the same velocity, the wrecking ball has more momentum. However, you could make the tennis ball have more momentum by throwing it faster.

5. Calculating Momentum momentum=mass x velocity p=mv (yes we use a p to represent momentum!)

6. Let’s Practice What is the momentum of a 1.5kg ball moving at 2 m/s? What is the formula? Plug in!

7. You try! A 3kg ball is moving with a velocity of 1m/s. What is the ball’s momentum?

8. Momentum can be transferred A collision is a situation in which two objects in close contact exchange energy and momentum. If two objects are involved in a collision, the object with less mass will have the greater change in velocity.

9. Conservation of Momentum The total momentum of a system of objects does not change, as long as there are no outside forces. Pg. 67 D visual

11. Conservation of momentum is really just another way of looking at Newton’s third law!

12. Bill Nye video (22 min) https://www.youtube.com/watch?v=4kPa0DLv 8b4

13. Momentum Worksheet Complete the Momentum Worksheet in your notebook. DO NOT WRITE ON MY SHEET!!