PHYSICS!!!!!!!!!!!!!!!!!!!!!?

Rachel: PHYSICS!!!!!!!!!!!!!!!!!!!!!?
You drop a 5.00 kg object from a barn, and a haystack is positioned 10.0 m below the rooftop of the barn.

a. Determine the kinetic energy of object the instant before it hits the haystack.

b. Determine the speed of the object the instant before it hits the haystack.

Answers and Views:

Answer by David
Einitial = Efinal

Eg = Ek
mgh = Ek
5*9.8*10 = Ek
Ek = 490 J

Ek = ½mv^2
v = sqrt(2Ek/m)
v = sqrt(980/5)
v = 14 m/s