What length of rope must the operator pul and what is the ideal mechanical advantage (MA) of the pulley system if the 15 N load is to be raised 1 m? (Assume the rope is sufficiently long to accommodate movement of the load and that all pulleys are frictionless.)
1.0 m, MA-3
А
B
3.0 m, MA 3
С
10 m, MA-1/3
D
30 m, MA=1/3

Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev,respectively?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?