Physics, 09.11.2019 01:31, colochaortiz20p7cajw
You can think of the work-kinetic energy theorem as the second theory of motion, parallel to newton's laws in describing how outside influences affect the motion of an object. in this problem, solve parts (a), (b), and (c) separately from parts (d) and (e) so you can compare the predictions of the two theories. a 16.1 g bullet is accelerated from rest to a speed of 730 m/s in a rifle barrel of length 64.8 cm.
(a) find the kinetic energy of the bullet as it leaves the barrel.
(b) use the work-kinetic energy theorem to find the net work that is done on the bullet.
(c) use the result in part (b) to find the magnitude of the average net force that acted on the bullet while it was in the barrel.
(d) now model the bullet as a particle under constant acceleration. find the constant acceleration of the bullet that starts from rest and gains a speed of 730 m/s over a distance of 64.8 cm.
(e) modeling the bullet as a particle under a net force, find the net force that acted on it during its acceleration.
Answers: 2
Physics, 21.06.2019 17:30, Xavier2712
Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.
Answers: 1
Physics, 22.06.2019 04:40, love5965
Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely
Answers: 1
Physics, 22.06.2019 06:30, kdfawesome5582
Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.
Answers: 2
You can think of the work-kinetic energy theorem as the second theory of motion, parallel to newton'...
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