[10 Points) The two disks shown below are connected by a belt which does not slip as disks rotate. Disk A has a radius of 0.50 m and a mass of 2.00 kg, while disk B has a radius of 0.75 m and unknown mass. For the two disks have the
same angular momentum, what must be the mass of disk B? Assume that disk A is being rotated with an angular speed
of 1.50 rev/s and treat the disks as uniform cylinders. (Hint: When two disks are connected by a belt that does not slip,
the linear speeds at the rim of each disk are equal.)

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers

Which of the following is the best name for mgcl2