An 92-kg football player traveling 5.0m/s in stopped in 10s by a tackler. what is the original kinetic energy of the player? express your answer to two significant figures and include the appropriate units. what average power is required to stop him? express your answer to two significant figures and include the appropriate units.

Which of the following is the best name for mgcl2

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?

Which radioisotope is used in dating geological formations?