0.5 Momentum

Last updated 14 days ago

5 questions

To start with your studies in Momentum, we will look at a lab activity on Pivot Interactives. Please go to this link to join the summer work class.

There you will find an activity titled 'Introduction to Conservation of Momentum'  I encourage you to work through this (about one hour) with a friend or two, treating it like a lab activity you would do in class. This part of the summer work is a little longer since Momentum is assumed knowledge at the AP Physics 1 level for AP Physics 2. 

If you would like a little more review, the videos below go through most of Impulse-Momentum at an AP Physics 1 Level:
Momentum & Impulse
Impulse-Momentum Theorem
Conservation of Momentum

We will use OpenStax College Physics for AP Courses for the summer assignment. Please read/study sections 8.1-8.3 in the book. This might be new to most of you, so spend some time with it. Hopefully this will make the insights learned in the Pivot Interactives Lab Activities make more sense. 

Required

23.
Professional Application
Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 150,000 kg and a velocity of 0.300 m/s, and the second having a mass of 110,000 kg and a velocity of −0.120 m/s. (The minus indicates direction of motion.) What is their final velocity?

More practice problems from physicsclassroom, with solutions.

CHALLENGE! 39.
Professional Application
One of the waste products of a nuclear reactor is plutonium-239 (239Pu). This nucleus is radioactive and decays by splitting into a helium-4 nucleus and a uranium-235 nucleus (4He+235U), the latter of which is also radioactive and will itself decay some time later. The energy emitted in the plutonium decay is 8.40×10–13J and is entirely converted to kinetic energy of the helium and uranium nuclei. The mass of the helium nucleus is 6.68×10–27kg, while that of the uranium is 3.92×10–25 (note that the ratio of the masses is 4 to 235). Calculate the velocities of the two nuclei, assuming the plutonium nucleus is originally at rest.

Required

Watch this video then answer the questions below.
48. Professional Application
A 5.50-kg bowling ball moving at 9.00 m/s collides with a 0.850-kg bowling pin, which is scattered at an angle of 85.0º to the initial direction of the bowling ball and with a speed of 15.0 m/s. (a) Calculate the final velocity (magnitude and direction) of the bowling ball.

Required

48. Professional Application
A 5.50-kg bowling ball moving at 9.00 m/s collides with a 0.850-kg bowling pin, which is scattered at an angle of 85.0º to the initial direction of the bowling ball and with a speed of 15.0 m/s. (b) Is the collision elastic?

Required

48. Professional Application
A 5.50-kg bowling ball moving at 9.00 m/s collides with a 0.850-kg bowling pin, which is scattered at an angle of 85.0º85.0º to the initial direction of the bowling ball and with a speed of 15.0 m/s. (c) Linear kinetic energy is greater after the collision. Discuss how spin on the ball might be converted to linear kinetic energy in the collision.

0.5 Momentum

48. Professional ApplicationA 5.50-kg bowling ball moving at 9.00 m/s collides with a 0.850-kg bowling pin, which is scattered at an angle of 85.0º to the initial direction of the bowling ball and with a speed of 15.0 m/s. (b) Is the collision elastic?

48. Professional Application
A 5.50-kg bowling ball moving at 9.00 m/s collides with a 0.850-kg bowling pin, which is scattered at an angle of 85.0º to the initial direction of the bowling ball and with a speed of 15.0 m/s. (b) Is the collision elastic?