Question

1. choose the best answer. according to newtons first law of motion, an object in motion stays in motion. why does a ball that is thrown into the air eventually fall back to the ground? static friction stops the motion of the ball. a human arm is not very strong. the unbalanced force of the earths gravity becomes greater than the force imparted by your hand. the ball is heavier than air and is pressed downward by the air.

Explanation:

Newton's first law of motion states that an object in motion stays in motion unless acted upon by an external force. When a ball is thrown into the air, the force of gravity (an external force) acts on it and eventually makes it fall back to the ground. Static friction is not relevant here as it pertains to stationary objects and preventing them from starting to move. The human - arm strength is not a factor once the ball is in the air. The unbalanced force of the earth's gravity pulling the ball down is what causes it to fall. Also, the ball being heavier than air is not the main reason for it falling as the key factor is the gravitational pull.

Answer:

According to Newton's first law of motion, an object in motion stays in motion, why does a ball that is thrown into the air eventually fall back to the ground? The unbalanced force of the earth's gravity becomes greater than the force imparted by your hand.