Use the law of momentum conservation to solve the following problems.
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.
Post-collision speed of all three players. Enter a + value.
Post-Collision Speed
m/s
Post-collision direction of all three players.
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.
Post Coll'n Velocity of B
cm/s
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?
Post-Coll'n Speed
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?
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 …
… momentum of the Marble 1 before the collision in g•cm/s.
Marble 1 p (before)
g•cm/s
… momentum of the Marble 2 before the collision in g•cm/s.
Marble 2 p (before)
… momentum of the system of two marbles before the collision in g•cm/s.
Total System p (before)
… momentum of the system of two marbles after the collision in g•cm/s.
Total System p (after)
… momentum of the Marble 1 after the collision in g•cm/s.
Marble 1 p (after)
… momentum of the Marble 2 after the collision in g•cm/s.
Marble 2 p (after)
… speed of Marble 2 after the collisions in cm/s.
Marble 2 Speed (after)
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?
Avi's Speed