Which of the following confirms that gravitational mass and inertial mass are equivalent?

a. free-fall acceleration is the same throughout the universe.
b. free-fall acceleration is the same at all points where the gravitational field strength is the same.

c. newton’s second law is valid throughout the universe.
d. an object’s weight can change with location, but the object’s mass remains constant.

If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance. what is its vertical displacement (in m) after 6 s?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?