Two balls are about to collide. Ball 1 has a mass of 10kg, and is moving [down] at an unknown speed. Ball 2 is 11kg and is moving [up] at a speed of 6m/s. After they collide, ball 1 moves with a velocity of 8m/s [60° Up of right]. Ball 2 moves with an unknown velocity [55° down of left]. An image has been added to help picture the situation. What is the initial velocity of ball 1?

Two balls are about to collide. Ball 1 has a mass of 14kg, and is moving [down] at an unknown speed. Ball 2 is 9kg and is moving [up] at a speed of 12m/s. After they collide, ball 1 moves with a velocity of 10m/s [80° Up of right]. Ball 2 moves with an unknown velocity [60° down of left]. An image has been added to help picture the situation. What is the initial velocity of ball 1?

6) Consider an atomic nucleus that's moving at a speed of 500m/s. This nucleus emits an alpha particle (=nucleus of a Helium atom) in the direction of its velocity, and the new nucleus (produced by the emission of the alpha particle) slows to 450m/s. If the alpha particle has a mass of 4u and the original nucleus has a mass of 208u, what speed does the alpha particle have when it is emitted? (Here u is the atomic mass unit. You could take for u the value of the proton mass, i.e. u= m, = 1.67 × 10-27kg.)

The Law of Conservation of Momentum states that momentum does not change in any... Closed, Isolated system Closed, Free system Open, Isolated system Open, Free system

Our brave astronaut Ms. Rose Noneck is at rest spacewalking 9.3 m away from her spaceship when her jetpack runs out of electricity (powered by TCC?). And worst – she is down to 60 seconds of oxygen left – there's plenty in her spaceship as well as her delicious lunch of baba ganoush. She remembers Prof. P's class and throws her 23.6 kg jetpack in the opposite direction of her spaceship at 1.4 m/s. Her mass is 55 kg. Will she make it back to her spaceship before she runs out of air? Convince me with numbers - tell me how long in seconds it takes for her to get back. Will we be seeing her in Exam 4? Or is it the end for her?

As a car was passing through an intersection at 8.01 m/s [0.0°] it was hit broadside by a 1600 kg pickup truck running a red light at 8.38 m/s [90.0°]. Immediately after the 0.185 s collision, the velocity of the car was 5.68 m/s [62.4°], and the velocity of the truck was 6.12 m/s [48.78°].Based on the information in the above narrative, the mass of the car was   a 1.20 ´ 103 kg. b 1.05 ´ 103 kg. c 9.50 ´ 103 kg. d 1.28 ´ 103 kg. please show all work, thank you

this is a practice problem, not a graded assignment

Help with the following question: The second photo is not a question, it’s just to help you solve

Toy car 1 of mass 250 gram and velocity 0.25 m/s and toy car 2 of mass 350 gram and velocity 0.20 m/s are moving on the same track in the same direction. After collision, car 1 moves with velocity 0.15 m/s. (a) What is the velocity of car 2? (b) How much thermal energy is generated during the collision?