How fast is the 2,000 kg plane moving with 40,000 J of energy? a. 6.3 m/s
B. 80.2 m/s
C. 40 m/s
d. 1,600 m/s

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

Suppose that f : rn → rm and that a ∈ k, where k is a connected subset of rn . suppose further that for each x ∈ k there exists a δx > 0 such that f(x) = f(y) for all y ∈ bδx (x). prove that f is constant on k; that is, f(x) = f(a) for all x ∈ k

A( developed during the process of technology design