A pickup truck (2,200 kg) and a compact car (1,100 kg) are moving so that they have the same momentum. What is the ratio of their kinetic energies? Explain how you Si

When some cars are advertised, they quote a "stopping distance" from some speed to zero.  The mass of the car and this value of "some speed" give a measure of initial motion, but we aren't necessarily told the mass.  Using the stopping distance, one can directly calculate what physical quantity provided by the brakes? A   impulse B   chemical potential energy C   power D   kinetic energy E   force F   velocity G   work H   acceleration I   mass

a 600 gram banana sliding north on a frictionless table at 2.5 meters per second bounces of a 400 gram kiwi fruit that is initially at rest , after colliding the banana continues moving north at 0.5 meters per second. At the North edge of the track is a frictionless inclined ramp which the kiwi fruit slides up to then the kiwi comes back down the ramp , without losing energy , and will now be moving south , the kiwi will catch up and hit the banana again. How much momentum did the kiwi have just before the sticky collision ? how much just after ? how much did the kiwis momentum change ?

A man weighing 680 N and a woman weighing 420 N have the same momentum. What is the ratio of the man's kinetic energy Km to that of the woman Kw?

A railroad freight car of mass 2.84 x 10ª kg collides with a stationary caboose car. They couple together, and 36.0% of the initial kinetic energy is transferred to thermal energy, sound, vibrations, and so on. Find the mass of the caboose. Number i Units

a 600 gram banana sliding north on a frictionless table at 2.5 meters per second bounces of a 400 gram kiwi fruit that is initially at rest , after colliding the banana continues moving north at 0.5 meters per second. At the North edge of the track is a frictionless inclined ramp which the kiwi fruit slides up to then the kiwi comes back down the ramp , without losing energy , and will now be moving south , the kiwi will catch up and hit the banana again. If the last collision took 20 milliseconds , what was the average force exerted by the banana on the kiwi during the collision (magnitude and direction ) ? by the kiwi on the banana?

A 0.015-kg bullet is fired into a stationary block of wood of mass of 5.2 kg. The relative speed of the bullet with respect to the wood is zero after collision (The bullet becomes embedded on the block of wood). If the speed of the bullet before collision is 462 m/s, what is the kinetic energy of the bullet plus-wood combination right after the collision? Assume no change in the potential energy of the system before and after the collision. Express your answer in two decimal places, in Joules.