lasisdabomb said:
When problems about trajectories refer to initial and final velocities, they mean the initial and final velocities while in the air. The velocity whilst still in the hand or after hitting the ground are not apropriate because in those phases there are forces other than gravity (and air resistance) acting.lasisdabomb said:
The motion of the ball when thrown vertically upwards is called projectile motion. This means that the ball moves in a curved path, with an initial upward velocity and then a downward acceleration due to gravity.
The height at which the ball is thrown affects how high it will go and how long it will stay in the air. The higher the initial height, the higher the ball will go and the longer it will take to come back down.
Yes, air resistance does affect the motion of the ball. As the ball moves through the air, it experiences a force in the opposite direction of its motion due to air resistance. This can cause the ball to slow down and affect its trajectory.
As the ball rises, its velocity decreases due to the force of gravity pulling it downwards. At the highest point, the velocity is momentarily zero. As the ball falls, its velocity increases due to the acceleration of gravity pulling it back towards the ground.
The mass of the ball does not affect its motion when thrown vertically upwards. The only factors that affect its motion are the initial velocity and the force of gravity. However, a heavier ball may experience more air resistance and therefore have a slightly different trajectory compared to a lighter ball.