2. A force acting on a particle moving in the xy plane is given by F = (1.91 y i + 1.24x2 j)N, where x and y are in meters. The particle moves from the origin to a final position having coordinates x = 4.77m and y = 4.77m, as seen in the figure below. B. (x.y)m 2a. Calculate the work done by F along OAc. Submit Answer Incorrect. Tries 1/10 Previous Tries 2b. Calculate the work done by F along OBC. Submit Answer Tries 0/10

Computation. 46 J of work is required to stretch an ideal spring from 1.5 m beyond its rest length to 3.1 m beyond its rest length. Calculate its spring constant, k. k N/m Record your numerical answer below assuming three significant figures. Remember to include a "-" if necessary. (C ^63 10:51 PM 10/23/2022 X ¦

A crate with mass m = 33.3 kg being pushed up an incline that makes an angle φ = 22.7 degrees with horizontal. The pushing force is horizontal, with magnitude P, and the coefficient of kinetic friction between the crate and the incline is μ = 0.358. Consider the work done on the crate as it moves a distance d = 5.32 m at constant speed. a. What is work done by the pushing force, in joules?  b. What is the work done by friction, in joules?  c. What is the work done by gravity, in joules?  d. What is the net work, in joules?

39 A 1.00 kg block slides down a 20.0 meter ramp at a constant velocity. The angle of inclination of the ramp is 30°. How much work is done by friction? Ans. 98.0 J 45. A car pulls a trailer with a force of 2000 N at 20.0 m/s. What is the Ans. 4.00 x 104 Watts power exerted?