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Momentum and Collisions 4: Collision Analysis

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Assignment Overview

Use the law of momentum conservation to solve the following problems.

 1. MC10Q1
Points: 0/2

In a goal line stand against New Greer Academy, South's linebackers Jerome (m = 98.2 kg) and Michael (m = 95.5 kg) meet the 68.9-kg halfback moving southward through the air at 6.53 m/s. Upon contact, Jerome and Michael are both moving at 4.75 m/s in the exact opposite direction. Determine the post-collision speed and direction of the collection of three players. Assume they move together after the collision.

  1. Post-collision speed of all three players. Enter a + value.

    Post-Collision Speed

    m/s

  2. Post-collision direction of all three players. 

    Direction
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 2. MC10Q2
Points: 0/1

Polly Ester and Ray Ahn are doing the Elastic Collision lab on a low-friction track. Cart A has a mass of 1.00 kg and is moving rightward at 11.1 cm/s prior to the collision with Cart B. Cart B has a mass of 2.00 kg and is moving leftward with a speed of 67.0 cm/s. After the magnetic repulsion of the two carts, Cart A is moving leftward at 70.5 cm/s. Determine the post-collision velocity and direction of cart B. Use a - for a leftward velocity and a + for a rightward velocity.

  1. Post Coll'n Velocity of B

    cm/s

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 3. MC10Q3
Points: 0/1

Tyrell is playing marbles with his younger sister. A 7.99-g marble moving at 1.27 m/s has a head-on collision with a 2.91-g marble, initially at rest on the playing surface. The post-collision speed of the 7.99-g marble is 0.78 m/s. What is the speed (in m/s) of 2.91-g marble after the collision?

  1. Post-Coll'n Speed

    m/s

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 4. MC10Q4
Points: 0/1

Every momentum unit needs a Silly Putty problem and here's ours:  

Two pieces of 'Silly Putty' are thrown in opposite directions toward one another (for some reason), collide head-on (miraculously), and stick together after the collision (as one might expect). One glob has a mass of 18.9 g and is traveling with a pre-collision speed of 7.31 m/s. The other glob has a mass of 10.7 g and a pre-collision speed of 5.81 m/s in the opposite direction. What is the post-collision speed two-glob combo?

  1. Post-Collision Speed

    m/s

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 5. MC10Q7
Points: 0/7

Jenkins and Jada are using Mr. H's marbles (the ones he hasn't lost) to play Marbles before their Block 1 Physics class. Jenkin rolls a 5.0-g marble at 20.9 cm/s. (We'll call this Marble 1.) It strikes a second marble, having a mass of 10.0 g and moving in the same direction at 11.9 cm/s. (We'll call this Marble 2.) After the collision, the Marble 1 continues forward with a speed of 10.0 m/s. Determine the …

  1. … momentum of the Marble 1 before the collision in g•cm/s.

    Marble 1 p (before)

    g•cm/s

  2. … momentum of the Marble 2 before the collision in g•cm/s.

    Marble 2 p (before)

    g•cm/s

  3. … momentum of the system of two marbles before the collision in g•cm/s.

    Total System p (before)

    g•cm/s

  4. … momentum of the system of two marbles after the collision in g•cm/s.

    Total System p (after)

    g•cm/s

  5. … momentum of the Marble 1 after the collision in g•cm/s.

    Marble 1 p (after)

    g•cm/s

  6. … momentum of the Marble 2 after the collision in g•cm/s.

    Marble 2 p (after)

    g•cm/s

  7. … speed of Marble 2 after the collisions in cm/s.

    Marble 2 Speed (after)

    cm/s

 6. MC6Q5
Points: 0/1

Mr. H takes his class next door to the community ice rink for a Physics lesson. Anticipating that something phenomenal will soon be happening, Avi (m = 70.6 kg) and Camila (m = 45.8 kg) quickly volunteer. They stand facing each other on the ice with their palms together. On Mr. H's cue, Avi pushes Camila to the right with a speed of 6.17 m/s. With what speed does Avi move to the left?

  1. Avi's Speed

    m/s

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