A.h = Vo*t + 0.5g*t^2 = 80
0 + 4.9t^2 = 80
B. V^2 = Vo^2 + 2g*h
V^2 = 0 + 19.6*80 = 1568
V = 39.6 m/s.
C.
An object with a mass of 100kg is dropped from an 80 meter high building and leaves an impression in the ground of 15cm.
A.What is the time needed to hit the ground?
B. What is the speed of the object when it hits the ground?
C. What is the coefficient of the friction between Earth and the object?
Please show all work!
1 answer
1 answer