A student at a skateboarding park is rolling on a skateboard down a ramp with a 26.0degree incline. (a) Consider the student and skateboard as a single unit and draw a free-body diagram to represent the forces present on the student and skateboard unit. (b) Explain what relationship must exist between the forces for the student to accelerate down the slope. (c) If the student and skateboard have a mass of 60.0 kg. what is the magnitude of the force of gravity parallel to the slope? (d) If the coefficient of kinetic friction in the wheels and bearings is 0.120 and the force of air friction is 20.5 N, what is the total force of friction on the student and skateboard? (e) Calculate the acceleration of the student and skateboard down the slope.

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.

Imagine an isolated positive point charge q (many times larger than the charge on a single proton). there is a charged particle a (whose charge is much smaller than charge q) at a distance from the point charge q. on which of the following quantities does the magnitude of the electric field created by charge q at particle a's position depend? check all that apply.the type of the charge on the charged particle athe relative orientation between q and a (while the distance between q and a is fixed)the specific location of the charged particle a (while the distance between q and a is fixed)the amount of the charge on the point charge qthe specific location of the point charge q (while the distance between q and a is fixed)the distance between the point charge q and the charged particle athe amount of the charge on the charged particle a

What is the speed vfinal of the electron when it is 10.0 cm from charge 1?