Photographic experimental analysis

(1) A ball moves the same distance at the same time, and A moves in a straight line, so A moves in a straight line at a constant speed.

B moves different distances in the same time, and B moves in a straight line, so B moves in a variable speed straight line.

(2) It takes 0.02s×3=0.06s for the ball to fall vertically from position A to position B, so the average speed of ball B is V = ST = 0.3m0.06s = 5m/s. 。

(3) The ball A moves in a straight line at a uniform speed, and the vertical upward resistance of the ball A and the vertical downward gravity are a pair of equal balance forces.

When B moves in an accelerated straight line, its gravity is greater than its resistance.

A and B have the same gravity, so the resistance of A is greater than that of B. 。

So, the answer is: (1) a; The distance traveled in the same time is equal; (2)5; (3) greater than.