Aboulder is raised above the ground so that its potential energy relative to the ground is 20,000j. it is then dropped. what is its kinetic energy just before it hits the ground

solve for (ke)

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)