A long cylinder of diameter 20 cm is closed
at one end. A piston is located at the other
end of the cylinder, as shown in the
diagram. The piston is attached to a spring
with the spring constant 5.0 * 10' N/m.
W
WWW
Piston
Piston
The cylinder is placed in water at 50 m
depth. What is the displacement of the
piston? Given: density of water = 1.0 x 10
kg/m and 9 = 9.8 m/s?

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?

If a simple machine reduces the strength of a force, what must be increased?