A particle undergoes two displacements. The first has a magnitude of 11 m and makes an angle of 73 ◦ with the positive x axis. The result after the two displacements is 8.7 m directed at an angle of 119◦ to the positive x axis using counterclockwise as the positive angular direction Find the angle of the second displacement (measured counterclockwise from the positive x axis). Answer in units of ◦

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

What is the scientific definition of energy that relates to work

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