A system consisting of a block and a horizontally-mounted spring oscillates with simple harmonic motion. The position of the block relative to its equilibrium varies according to the following equation:

x(t)= 2Sin(π/2t+ π/4)

At what time (in s) after t = 0 s is the potential energy of the system first at a maximum?

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

Which accurately compares concave and convex lenses?

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.