Aballistic pendulum is a device for measuring bullet speeds. one of the simplest versions consists of a block of wood hanging from two long cords. (two cords are used so that the bottom face of the block remains parallel to the floor as the block swings upward.) a 9.4-g bullet is fired into a ballistic pendulum in which the block has an inertia of 5.5 kg , and the block rises 60 mm above its initial position. part awhat is the speed of the bullet just before it hits the block? part bhow much energy is dissipated in the collision?

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is transformed ⇒ as it changes into other forms of energy.

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

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?