A chunk of rock (initially stationary) of mass 50 kg slides down the side of a volcano that slopes up an angle of 40 degrees relative to the horizontal. The rock accelerates at a rate of 3 m/s2. Find the following: Weight

Weight (parallel)

Weight (perpendicular)

Normal

Frictional Force

Coefficient of Friction

Fnet

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?