Sledding down a hill, you are traveling at 10 m/s when you reach the bottom. you (inertia 80 kg ) then move across horizontal snow toward a 400-kg boulder but jump off the sled (inertia 8.0 kg ) the instant before it hits the boulder. the boulder is sitting on very slick ice and moves freely when the sled hits it. the sled bounces back, moving at 6.0 m/s. at what speed does the boulder move after the sled hits it?

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix. b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds. c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer. d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

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