Two objects each moving with speed v travel in opposite directions along a straight line passing through both their centers. the objects stick together when they collide and move together with speed v/4 after the collision.
(a) what is the ratio of the final kinetic energy to the initial kinetic energy? ( kf/ki = 1/16)
(b) what is the ratio of the mass of the more massive object to the mass of the less massive object? ( mmore massive/mless massive = 5/3)

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

How do we measure or think of speed in the united states?

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.