Question

an experimental rocket plane lands on skids on a dry lake bed. it is traveling at 80.0 m/s when it touches down, how far does it slide before it comes to a stop? assume the coeffcient of kinetic friction between the skids and the lake is .600

Answer 1

initial K.E. = work done against friction

(1/2)M Vo^2 = M*g*U*X

U is the friction coefficient (0.600) Vo is the initial velocity
Mass M cancels out.

Solve for X

X = Vo^2/(2*g*U)

Answer 2

2.30