- #1
Valedictorian
- 3
- 0
Homework Statement
A worker on the roof of a building that is under construction dropped a 0.125 kg wrench over the edge. another workman on the 8th floor saw the wrench go by and determined that its speed at that level was 33.1 m/s. the first floor of the building is 12.0m high and each successive floor is 8.00m high. Neglecting air friction, how many floors does the building have? How fast was the wrench falling just before it hit the ground? What was its kinetic energy just before it hit the ground?
Homework Equations
PE=mgh
m-mass, g=9.8, h-height
KE=1/2 X mv^2
Ek-kinetic energy
PE = Potential Energy
KE = Kinetic Energy
The Attempt at a Solution
I don't really have any idea on how to solve this...it was a prize question by my teacher. Thanks in advance for any help!