ASAP PLEASE! The picture of the roller coaster shows
A) kinetic energy, because it is in motion.
B) potential energy, because it is not yet moving.
C) kinetic energy that would allow the roller coaster to propel endlessly.
D) potential energy that would allow the roller coaster to propel endlessly.

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

How would doubling the made of an object change the objects potential energy

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?