Name:
TOPIC: Impulse and Momentum
Block: __
Date:
Reading and problem
LAB: EXPLOSION: Analysis of Momentum
Momentum: : http://www.physicsclassroom.com/Class/momentum/u4l1a.cfm
“Is a mass in motion “
1. From the truck & car collision homework; what is easier to stop, a car going at 20 km/h or a truck going
at 20 km/hr?
2. Why is that?
3. Which of Newton’s Laws talks about this?
4. Is momentum a vector? ______ Is velocity a vector? ________ Is mass a vector? _______
5. So, for a mass in motion, when does it have more momentum; at low or at fast speed? ___________
6. View the problems at the bottom of the webpage. Practice and take notes for each question below.
Conservation of momentum for each object with 2 masses in the system.
http://www.physicsclassroom.com/class/momentum/U4L2b.cfm
1. Read the website.
2. View the problems at the bottom of the webpage. Practice and take notes for each question below.(3)
Impulse: Use your book:
1. How does the amount of mass relate to Newton’s first law in this activity? Write a statement.
2. What is Impulse?
3. What is Momentum?
4. What is meant by the Conservation of Momentum?
Explosion: Read and answer the questions: http://www.physicsclassroom.com/class/momentum/u4l2e.cfm
1. Where do the forces come from in an explosion?
2. How is that different from a baseball bat hitting the ball?
3. Which objects are in the INITIAL system?
4. What is the INITIAL Momentum of the system in an explosion experiment-before the explosion?
5. What is the FINAL Momentum of the system (all the fragments)-after the explosion?
6. Which objects are in the system after the explosion (FINAL situation)?
7. If both carts have the same mass, what is the final velocity of cart-A? _______ and of cart-B? ______
8. When one cart has twice the mass of the other, what is the final velocity of cart-A? _________ and of
cart-B? ________
9. When one cart has 4 times the mass of the other, what is the final velocity of cart-A? __________ and of
cart-B? _________
10. How does the velocity and the momentum of each cart compare to each other after the explosion.
11. Explain how momentum is conserved from before to after the explosion (INITIAL to FINAL).
Remember + and – signs.
12. Practice the questions at the end of the webpage. Take notes for each question below.