A boy sitting on the edge of a vertical cliff fires a rock with a slingshot at a velocity of 16.45758956 m/s and an angle of 59.78 degrees above the horizontal.

Question

A boy sitting on the edge of a vertical cliff fires a rock with a slingshot at a velocity of 16.45758956 m/s and an angle of 59.78 degrees above the horizontal.
The rock lands in a lake at the base of the cliff, a horizontal distance of 89.67 meters beyond the base of the cliff. How high is the cliff in meters?

i got an answer of y=-420.2599461m
      is this right??

drwls · Answer

No. How could a height be negative? Did you make up this problem? I makes not sense using ten significant figures. Show your work if you want your error to be found.

Pangani, Juma · Answer

The height of cliff is 560.4946206m