Define newton's second law.

a. when an object puts a force on another object, the second object puts a force back on the first, equal in magnitude but opposite in direction.
b. the total energy through any process is conserved.
c. objects tend to keep their motion unless acted upon by an unbalanced outside force.
d. fnet = ma

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

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?

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.