A 38.5 kg man is in an elevator accelerating downward. A normal
force of 343 N pushes up on him.
What is his acceleration?
[?] m/s2

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.