Masses of 3 kg and 4 kg are hanging at opposite ends of a cord that passes over a frictionless pulley. The system is held stationary for a while and then released. What will be the speed of the masses when the 4-kg mass has descended 0.5 m below it's starting pount

A spring of spring constant k = 822 N/m is suspended vertically from a ceiling. You attach a 46.0 kg mass to the spring and drop it. What is the speed of the mass when it is 2/3 of the way down to the position where it will momentarily stop?

This graph shows the net force on a particle as a function of its position. The mass of the particle is m = 1.5 kg 1. If the particle has a velocity of the X equals -4.5 m/s when X = 0m what is the particles speed when x=3.0m? 2. At what value of X (in meters) does the particle have the maximum kinetic energy? 3. What is the particles maximum kinetic energy?

A block of mass m= 5.00 kg is reased from point A and slides dows the frictionless track shown in the figure. calculate the speed of the block at piont B and C. g= 9.8m/s2