Which object will have the greatest change in
electrical energy?
(1) an electron moved through a potential
difference of 2.0 v
(2) a metal sphere with a charge of 1.0 × 10^−9 c
moved through a potential difference of 2.0 v
(3) an electron moved through a potential
difference of 4.0 v
(4) a metal sphere with a charge of 1.0 × 10^−9 c
moved through a potential difference of 4.0 v

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2