12) A 10.0 kg box is pushed up a ramp from the ground to a height of 1.00 m. The push force is parallel to the ramp.
a. What is the change in potential energy of the box?
b. How much work was done in moving the box?

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates