Question

1. a ball rolls along the ground, moving from north to south. what direction is the frictional force that acts on the ball?

a. north to south
b. south to north
c. west to east
d. east to west

Explanation:

Frictional force opposes the direction of motion. The ball moves from north to south, so friction acts opposite, i.e., south to north.

Answer:

b. South to north