The formula for calculating velocity is v = √2gh, where v is the velocity in meters per second (m/s), g is the acceleration due to gravity (9.8 m/s²), and h is the height in meters (m).
The mass of the ball does not affect its velocity when dropped from a certain height. The only factors that affect the velocity are the height from which it is dropped and the acceleration due to gravity.
The maximum velocity of a ball when dropped from a certain height is when it reaches the ground. This is because the velocity increases as the ball falls due to the acceleration from gravity until it reaches its maximum velocity at impact.
Yes, the velocity of a ball can be negative when dropped from a certain height. This happens when the ball is thrown upwards with an initial velocity and then falls back down. In this case, the velocity will be negative during the downward motion.
Yes, air resistance does affect the velocity of a ball when dropped from a certain height. As the ball falls, it will experience air resistance which will slow it down. However, this effect is usually negligible for small objects such as balls and can be ignored in most cases.