Linear Momentum

"Find the speed at which Superman (mass = 89.0 g) must fly head-on into a train (mass = 16405 kg) traveling at 75.0 km/hr to stop it."

linear momentum

"A 9800 kg boxcar traveling at 14.9 m/s strikes a second car. The two stick together and move off with a speed of 6.58 m/s. What is the mass of the second car?"

linear momentum

"Find the speed at which Superman (mass = 89.0 g) must fly head-on into a train (mass = 16405 kg) traveling at 75.0 km/hr to stop it."

An inelastic collision problem

A first box car with mass 9800 travelling at the speed 14.9m/s striking the second box car at rest. Then, both cars are sticked together and travel with the speed 6.58m/s. Find the mass of the second car.

collision

Hi. Can someone please show me how to do the following problem: "An 11.2 g object moving to the right at 21.3 cm/s makes an elastic head-on collision with a 17.3 g object moving in the opposite direction at 31.5 cm/s. What is the velocity of the 11.2 g object after the collision? (positive is to the right)" Thank you!

center of mass

Hi. Can someone please show me how to do the following problem? "A 5620 kg open railroad car coasts along with a constant speed of 8.66 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 3.50 kg per minute. Ignoring friction with the tracks, what is the speed of the car after 86.4 minutes?" ...continues

momentum

Hi. Can someone please show me how to do the following problem? "Two people, one of mass 75.6 kg and the other of mass 60.2 kg, sit in a rowboat of mass 82.4 kg. With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat 2.02 m apart from each other, now exchange seats. How far will th ...continues

elastic collision

Hi. Can someone please show me how to do the following problem? "A block of mass m = 2.32 kg slides down an alpha = 29.2° incline which is h = 3.56 m high. At the bottom, it strikes a block of mass M = 7.06 kg which is at rest on a horizontal surface (see drawing in attached Word document). If the collision is elastic, and f ...continues

momentum

Hi. Can someone please show me how to do the following problem? "A box of mass 20 kg is initially sliding (in the positive direction) along a frictionless horizontal surface at a speed of 10 m/s. Then a net horizontal force of 80 N (also in the positive direction) is applied to the box for a time period of 10 seconds. What is ...continues

Atmosphere Problem

Assume that you have a tightly capped 5 liter container of oxygenated water. The temperature of the water is 25 degrees celcius, the oxygen partial pressure being 2.4 atmospheres . This water is degassed(outgassed) such that 96% of the oxygen is removed. How many moles of oxygen gas are removed from the sample? How many molecule ...continues