Question

a stone is thrown in a horizontal direction on the earth it falls down in straight line​

Answer 1

The stone falls down in a straight line due to gravity.

Explanation:

• The  pull of the Earth is referred to as the the gravity.
• It is due to the gravity, that every thing tends to fall in the downward direction.
• The constant pressure of the atmosphere causes the stone to fall in the downward direction.
• Hence, the stone tends to falls down in the straight line.