Abasketball player throws a ball at 60° to the horizontal at a net 4.0m away. the height of the net is 3.3m. the ball leaves his hands at a height 2.0m from the ground. what is the initial speed of the ball? th pic above is my ans, but it's quite wierd. so if it's wrong, what is the correct ans, and why my ans is wrong(what mistakes i did).

For which pair of objects would adding the same a

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.