A ball is thrown vertically upwards from a height of 2 meters at a speed of 20 m/s. In the left graphics window the motion of the ball is displayed; the right graphics window shows the corresponding graphical representation.

[size=85][size=100]a) Play the animation and describe your observations![br][br](b) Activate the check box "graphical representation" and play the animation. What is displayed in the coordinate system?[br][br](c) Solve by using the graphical representation and compare your solution to the the situation presented on the left side.[br]• At which position and when do you find the ball's maximum height? [br]• At which position and when do you find the ball's minimum height?[br]• What is the height of the ball after 3 seconds?[br]• When is the height of the ball 12 meters?[br]• How far has the ball flown?[br]• What happens with the ball after 4.2 seconds?[br][br](d) Find a solution, explain and reason your considerations.[br]• How does the height change over time? Can you read this off the graphical representation?[br]• Determine the changes in height when the ball moves twice as long![/size][/size]