(20 14? Stroboscopic photography is a common experimental method to study the motion of objects. Photography is taken in a dark room, and there is a flash every once in a while.

(1) As can be seen from the figure, the time interval of the left ball from A to B is 3, and the moving time from A to B is 3t; The time interval of the right ball from A to B is 5, and the movement time of the ball from A to B is 5t, so the movement time of the right ball is longer.

(2) In the picture on the right, the interval between adjacent balls is the same, and the interval distance is also the same, so the balls move in a straight line at a uniform speed; In the left picture, the interval between adjacent balls is the same, and the interval distance is increasing, indicating that the balls are accelerating;

(3) The mass and gravity of the two balls are equal, both of which are G, and the ball on the left is in an accelerated motion state, so the resistance it receives is less than its gravity, that is, f < G；; The right ball is in a state of uniform linear motion and is subjected to a balancing force, and the resistance is equal to gravity, that is, f'= g, so f' > F. 。

So, the answer is: Yes; Right; That's right.