A50-cm-long spring is suspended from the ceiling. a 290 g mass is connected to the end and held at rest with the spring unstretched. the mass is released and falls, stretching the spring by 30 cm before coming to rest at its lowest point. it then continues to oscillate vertically.
(a) what is the spring constant? (k=)
(b) what is the amplitude of the oscillation?
(c) what is the frequency of the oscillation?

You throw a baseball directly upward at time t = 0 at an initial speed of 12.3 m/s. what is the maximum height the ball reaches above where it leaves your hand? at what times does the ball pass through half the maximum height? ignore air resistance and take g = 9.80 m/s2.

When a pair of 10-n forces act on a box of candy, the net force on the box is a 20 n. b about 14 n. c zero. d any of the above depending on the directions of forces.

An ascending elevator, hanging from a cable, is coming to a stop. part a part complete identify all forces acting on the elevator from the list below. select all that apply. select all that apply. kinetic friction normal force tension weight static friction submitprevious answers correct part b draw a free-body diagram of the object. draw the vectors starting at the black dot. the location and orientation of the vectors will be graded. the exact length of your vectors will not be graded but the relative length of one to the other will be graded.