Joshua drops a sheet of paper and a rock off of the roof at the same time. His friend Lisa watches from the ground.They had just learned dropped from a height should hit the ground at the same time When Joshua drops the two objects, the rock plummets straight down while slowly drifts down. Why did the rock hit the ground before the paper? The rock is smaller and experiences a higher force of friction from the air resistance. The paper is more spread out and experiences a higher force of friction from the air resistance. The rock is heavier so it is more affected by gravity than the paper. The paper is lighter so it is less affected by gravity than the rock.

## Step 1<br />The problem involves the concept of air resistance and gravity. When an object is dropped from a height, it experiences the force of gravity pulling it downwards. However, the effect of gravity on different objects can vary depending on their physical properties.<br /><br />## Step 2<br />The rock, being denser and heavier, experiences a greater force of gravity pulling it downwards. This means that the rock will fall faster than the paper.<br /><br />## Step 3<br />On the other hand, the paper, being lighter and more spread out, experiences a greater force of air resistance. This force of air resistance opposes the force of gravity, slowing down the paper's descent.<br /><br />## Step 4<br />Therefore, the paper hits the ground later than the rock because it experiences a greater force of air resistance, which slows down its descent.