kinetic energy gets lost

A woman with a mass of 59 kg runs at a speed of 6 m/s and jumps onto a giant 30 kg skateboard initially at rest. What is the combined speed of the woman and the skateboard?

Railroad cars collide and stick together. How fast are the moving after sticking? Railroad car A is 1200kg and moving at 20.0m/s. Railroad car B is 8000kg and is not moving.

A firework accidently explodes while on the ground. The firework was initially at rest and breaks into 2 pieces in the explosion. Piece A has 1.50 times the mass of piece B. Part A If 5300 J is released in the explosion, and 90% of that energy goes into the kinetic energy of the 2 pieces, what is the final KE of piece A and piece B? KEA, KEB= for Part A for Part A undo for Part A redo for Part A reset for Part A keyboard shortcuts for Part A help for Part A J

Jermaine is riding his skateboard around the playground when he “accidentally” bumps into his older brother, Tito, who is sitting motionless on a swing. Jermaine’s mass is 35 kg and Tito’s mass is 45 kg and Jermaine comes to rest because of the collision. If Tito swings up to a height of 0.50 m above his starting position because of the collision, how fast was Jermaine moving just before the collision

A 1000 kg car traveling at 15 m/s runs into a 2000 kg car at rest. Determine the percent of kinetic energy lost. I know that the final velocity is 5m/s, but I don't know how to find the energy lost (should be 67%). Tysm in advance!!

Quesitos: The drawing shows a bullet passing through two blocks that rest on a horizontal, frictionless surface. Rule out air resistance. The bullet completely passes through the first block and is buried in the second block. Notice that after the collision, both blocks move. Can the Conservation Principle be applied from Linear Momentum to this three-body system? Justify your answer (Ignore any loss of mass from the first block). Problem: A 4.00-g bullet moves horizontally with velocity of + 355m / s. The mass of the first block is 1150 g, and its velocity after the bullet passes through it it is +0.550 m / s. The mass of the second block is 1530 g. (a) Obtain the speed of the bullet after passing through the first block, (b) obtain the velocity of the second block after the bullet is buried in it

How do I solve this problem step by step?

In the game of pool, all the balls have the same mass (0.17 kg). Look at the figure carefully. The white cue ball hits the black ball which was initially at rest on the table. The image below shows what happens to each ball. The black ball has a speed of 1.5 m/s after the collision. What is the speed of the white cue ball after the collision? 3.0 m/s a) 1.8 m/s b) 2.6 m/s c) 4.3 m/s d) 5.2 m/s e) 1.5 m/s 30.0° 60.0° 1.5 m/s

A 83.2 g marble moving at 10.2 m/s approaches and collides head-on with a stationary 41.8 g marble. Assuming that the collision is elastic, what are the corresponding kinetic energy of each marble?