Aphysics student is riding on a train traveling north. having read about inertia, the student performs an experiment with a golf ball. he reaches over the aisle and drops the ball from rest. instead of hitting the floor directly below the student’s hand, it hits to the north, i. e., forward of that position. which of the following might be the cause for this to happen?
(a) the train is moving at constant
(b) the train is speeding up. veloeity
(c) the train is slowing down.
(d) whatever the cause, it cannot be any of the answers given.

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive