When rolling downhill, a roller coaster's gravitational potential energy changes its form many times. Identify the form(s) of energy that it will become throughout the ride. a
kinetic (motion) energy.
b
thermal energy.
c
sound energy.
d
All of the above

Describe uniform velocity and variable velocity in short

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.