A ball rolls horizontally with a speed of 9.2 m/s off the edge of a tall platform. If the ball lands 7.8 m from the point on the ground directly below the edge of the platform, what is the height of the platform?

An arrow is launched horizontally from the top of a pyramid that is 100 m above the ground as shown in figure 1. If the arrow strikes the ground at a point 65.0 m horizontally away from and below the point of release. What is the speed of the arrow (in m/s) just before it strikes the ground?

A ball is launched from the top of an 24.8 m tall building at an angle = 26.0° above horizontal with a speed of 2.85 m/s. What is the ball's horizontal distance (in m) from the building at the time it reaches the ground? Use g = 9.81 m/s?). (These are my steps but I don’t know what to do next. The outcome should be 6.1. I did 2.13*2.562 and got 5.46. Don’t know what I did wrong)

The height of a basketball hoop is 3.05 m and the distance between the hoop and the free throw line is 4.57 m. If a 1.90 m tall person shoots the ball from the free throw line at an angle of 54.0° with respect to the horizontal, at what speed should the ball leave his hands?