The answer is (D) Fluorite
The ball will bounce at a height lower than the height it was dropped.
Answer: Option B.
<u>Explanation:</u>
When a basket ball is thrown from a particular height, it bounces back. But the height it bounces back at is not exactly the same height from where it was thrown.
With further bounces, the energy of the basket ball goes on decreasing and the bounces go on getting smaller. This shows that there is a change in the energy of the basket ball with every bounce that the ball makes. Some energy lost from the ball gets absorbed by the court and some of the energy is changed into thermal energy.
-- At the end of 18sec, the stone's velocity is (9.8m/s² x 18s) = 176.4m/s downward.
-- Starting at 0 m/s and ending at 176.4m/s, its average velocity is 88.2m/s downward.
-- Falling for 18s at an average speed of 88.2m/s, it falls (88.2m/s x 18s) = 1,587.6 m .
-- Its displacement is <em>1,587.6 meters downward.</em>
Its becuase weight and mass are different. Even if an object weighs more than another object it might not have more mass than the other object.
