A skier of mass 70 kg is pulled up a slope by a motor-driven cable. a) How much power is required to pull him 100 m up a 30° frictionless slope at a constant
speed of 2 m/s? b) How many horsepower (hp) output must a motor have to
perform this task? *

Which type of circuit is becoming more common in residential electrical design and construction? a. hazardous-area circuit b. three-phase circuit c. 480-volt circuit d. communication circuit

This is the substance(s) formed in a chemical reaction.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.