The cable lifting an elevator is wrapped around a 1.2-m-diameter cylinder that is turned by the elevator's motor. the elevator is moving upward at a speed of 2.7m/s. it then slows to a stop, while the cylinder turns one complete revolution.
how long does it take for the elevator to stop?

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?