Joel and bobby each move an identical box from the ground to a shelf that is 1.2m from the ground. joel moves his box in half the time it take s bobby to move his box. what is the ratio of joel's power output to bobbys power output

This is one type of line graph in which the independent variable is time plotted on the x axis and the dependent variable, also numerical, is plotted on the y axis.

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.

Apendulum has 592 j of potential energy at the highest point of its swing. how much kinetic energy will it have at the bottom of its swing?| units: