A ball is thrown up with speed $3$ m s-1 from the ground. Find the greatest height it reaches.
0.459
A ball is thrown up with speed $5$ m s-1 from the ground. Find the time it takes to fall back down to the ground.
1.02
A ball is thrown up with speed $4$ m s-1 from a point that is $2$ m above ground. Find the time it takes to fall down to the ground.
1.17
A ball is thrown up from a point that is $1$ m above the ground. $2$ s later, it hits the ground. Find the speed of the ball when it was thrown.
9.3
A ball is thrown down from the top of a building with speed $3$ m s-1. In the moment before it its the ground, it has a speed of $10$ m s-1. Find the height of the building.
4.64
A ball is thrown up with speed $10$ m s-1. 2 seconds later, another ball is also thrown up with speed $10$ m s-1. The balls collide. Find the time it takes for them to collide.
2.02
A ball is thrown from the top of a house. It takes $1$ s to fall halfway down and another $0.6$ s to fall to the ground. Find the speed and direction it was thrown with.
6.86 down
A ball is thrown from the top of a skyscraper that contains 20 floors. It takes $1$ s to travel the first two floors, and another $1$ s for the next four floors. Find the speed of the ball as it hits the ground.
44.1