Center of mass and momentum Questions

Physics

Center of mass and momentum Solutions

1 pts Question 24 A 13-g bullet being fired at 250 m/s passes through a 4.0 cm thick foam plastic sheet. The bullet emerges with a speed of 90 m/s after a time interval of 2.4 x 10-5 s. What is the average force that impeded the bullet's motion through the plastic? 8.7 x 104N 0 7.4 x 104 N O 10.2 x10 N 0 5.2x10 N

Physics

Center of mass and momentum Solutions

A uniform sheet of mass M is lying on co-ordinate axis as shown in the figure. What is co-ordinate of centre of mass of sheet? (A) [3(√3-1)b]/√3, [3(√3-1)b]/√3 (B) [3(√3+1)b]/√3, [3(√3+1)b]/√3 (C) √3b/3(√3-1), √3b/3(√3-1) (D) √3(√3-1)b/2, √3(√3-1)b/2

Physics

Center of mass and momentum Solutions

A 45.00-kg girl jumps from the side of a pool into a raft (m = 0.08 kg) floating on the surface of the water. She leaves the side at a speed of 1.10 m/s and lands on the raft. At what speed will the girl and the raft begin to travel across the pool?

Physics

Center of mass and momentum Solutions

A 2.5 kg firework moving with a velocity of 5.6 m/s to the right explodes in mid-air into two pieces. One of the exploded pieces has a mass of 1.4 kg and a velocity of 16.4 m/s to the right. What is the speed of the other piece?

Physics

Center of mass and momentum Solutions

A bullet with a mass of 0.0063 kg and a speed of 748.0 m/s is fired so that it hits a block of wood with a mass of 0.233 kg that is initially at rest on a frictionless surface. The bullet flies into the block and through the other side with a speed of 349.1 m/s. What is the speed of the wood block after the bullet has passed through it?

Physics

Center of mass and momentum Solutions

A 53.1 kg astronaut on a spacewalk is floating 34.9 m away from the spaceship when the tether breaks leaving the astronaut stranded. Luckily the astronaut has a 14.9 kg oxygen tank that they can throw away from the ship to gain momentum in the opposite direction. If the astronaut throws the oxygen tank with a speed of 1.0m/s away from the spaceship, how long does it take the astronaut to make it to the spaceship?

Physics

Center of mass and momentum Solutions

A bullet with a mass of 0.0098 kg and a speed of 639.4 m/s is fired so that it hits a block of wood with a mass of 0.074 kg that is initially at rest on a frictionless surface. The bullet flies into the block and through the other side with a speed of 331.2m/s. What is the speed of the wood block after the bullet has passed through it?

Physics

Center of mass and momentum Solutions

A 757 kg train car moving with a speed of 12.6 m/s to the right, crashes into a 2nd 1269 kg train car moving with a speed of 3.8 m/s to the right. The trains lock up and move together. What is the speed of the combined train cars?

Physics

Center of mass and momentum Solutions

A 10-g block slides with a velocity of 21 cm/s on a smooth level surface and makes a head-on collision with a 25 g block moving in the opposite direction with a velocity of 8 cm/s. If the collision is perfectly elastic, what is the velocity of the 25-g block after the collision?

Physics

Center of mass and momentum Solutions

Main Menu Contents Grades Ir Course Contents » ... » HW Bonus » internal explosion occurs, splitting the body into two chunks Timer Notes Evaluate Feedback Print (hrw8c9p92) A body of mass 6.0 kg is traveling at 3.3 m/s along the positive x-axis with no external force acting. At a certain instant an internal explosion occurs, splitting the body into two chunks of 3.0 kg mass each. The explosion gives the chunks an additional 16 ) of kinetic energy. Neither chunk leaves the line of original motion. Determine the speed and direction of motion of each of the chunks after the explosion. Enter the larger velocity. Submit Answer Tries 0/8 Enter the smaller velocity. Submit Answer Tries 0/8 Send Feedbac This discussion is closed.

Physics

Center of mass and momentum Solutions

2022 Spring, PHYS 211 (cook) Messages Courses Help Logo Tuyen Tran (Student - section: 003) Main Menu Contents Grades Course Contents >> ... >> HW Bonus » Find the z-coordinate of the center of mass of the box ÖTimer Notes Evaluate Feedback Print In Z H o X L (hrw8c9p5) A cubical box, open at the top, with edge length 68 cm, is constructed from metal plate of uniform density and negligible thickness (see the figure). Find the z-coordinate of the center of mass of the box ( cm). Submit Answer Tries 0/8 Send Feedback This discussion is closed.

Physics

Center of mass and momentum Solutions

Inf Main Menu Contents Grades Timer Notes >> HW Bonus » center of mass of the Earth-Moon Evaluate Feedback Print Course Contents >> (hrw8c9p115) How far is the center of mass of the Earth-Moon system from the center of the Earth? (m) (Appendix C gives the masses of the Earth and the Moon and the distance between the two.) Submit Answer Tries 0/8 Express thes previous answer as a fraction of the Earth's radius. Submit Answer Tries 0/8 Send Feedback This discussion is closed.