A movie stunt driver on a motorcycle speeds off a 50m cliff how fast must the motorcycle leave the cliff top if it is to land at on the land ground below 90m from the base of cliff where the cameras are

Idon’t quite understand this problem

Difference between series and parallel circuits

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)