A.) How fast is the coaster traveling at the bottom of the loop-de-loop. B.) Find the velocity of the coaster at the top of the loop-de-loop.
C.) Find the velocity at the end of the ride. (at 35 m)
D.) If a giant spring were placed at the end of the ride (35 m high), determine the spring constant necessary to stop the coaster in 1.8 m.
E.) If 60% of the original energy is lost due to friction, determine the velocity at the end. (35 m)

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

In a good thermo flask the main cause of heat loss is

Aracecar driver has to hold on tightly when going around a banked curve. approximately what is the centripetal force on a 2220.0 kg car going around a circle with a diameter of 190.0 meters at 25.0 m/s?