15-109. The elastic cord has an unstretched length lo = 1.5 ftand a stiffness k= 12 lb/ft. It is attached to a fixed point at Aand a block at B, which has a weight of 2 lb. If the block isreleased from rest from the position shown, determine itsspeed when it reaches point C after it slides along the smoothguide. After leaving the guide, it is launched onto the smoothhorizontal plane. Determine if the cord becomes unstretched.Also, calculate the angular momentum of the block aboutpoint A, at any instant after it passes point C.4 ft-ва3 ftk = 12 lb/ft

From the figure, conservation of total energy TB+VB=TC+VC12mvA2+12ks12=12mvC2+12ks22 Substitute,…

Answered: 15-109. The elastic cord has an…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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FRICONLESS stretched length l, = 0.8 m, spring constant k = 1 kNím, L unstretched length l, = 50 cm. SLOPE A CRATE - Asci - Asi Pam 20cm 30° BE Ground Level ROUGH SURFACE Disregard the geometry of the crate and assume that the crate maintains its velocity as it transfers from the frictionless slope to the rough horizontal surface (no tumbling). The 13 kg shipping crate is initially hooked to a stretched spring The crate is released from rest at Position A, which is elevated 20 cm from the ground, after which it initially moves up the incline. The spring completely detaches from (and stops interacting with) the crate once the crate has stopped moving up the incline. a. Determine the work (J) done by friction if the crate makes a complete stop at Position B after traveling As; = 9 m horizontally from point 0. b. Calculate the coefficient of kinetic friction between the crate and the rough surface. c. Find the deceleration (m/s? ) experienced by the crate due to friction with the rough…
The block of mass 0.5 kg is pushed against a horizontal spring and the spring is compressed by x. After it is released it moves along frictionless horizontal surface and reaches the point A with a speed of v_A = 11.0 m/s. The block experiences an average friction force of 6.0 N while sliding up the circular track. The radius of the track R=1.0 m. Can the block pass the top point (point B) without fall off of the track? В R k Yes. The block can safely turn the track. O No. The block will reach the top, but it will fall off the track. Can not determine with the given information O The block can only climb the quarter of the track. No. It will fall off before reaching the top.
A block with mass 300 g is held at rest against a spring with spring con- stant 200 N/m that has been compressed 3 cm from its equilibrium length. The block is released and allowed to slide on a table, and the coefficient of kinetic friction between the block and the Problem 1 table is 0.3. The block slides a short distance on the table and then comes to rest. Assume the block loses contact with the spring when the spring is at its equilibrium length, and that the friction force only acts after the block has lost contact with the spring. (a) How much work does the spring force do on the block? (b) How much work does the kinetic friction force do on the block? (c) After leaving the spring, what distance does the block slide before coming to rest? (d) What speed did the block have after sliding 5 cm from the point it lost contact with the spring?
A gymnast of mass 52.0 kg is jumping on a trampoline. She jumps so that her feet reach a maximum height of 2.74 m above the trampoline and, when she lands, her feet stretch the trampoline 69.0 cm down. How far does the trampoline stretch when she stands on it at rest? Assume that the trampoline is described by Hooke’s law when it is stretched.
Assume a small box (m = 222 g) slides along a frictionless ¼ circle track of radius R = 1.00 m onto a horizontal plane and into a spring of spring constant k = 55.5 N/m as shown in the following figure. The plane has a coefficient of friction that changes along the plane µ(x) = 0.200 x + 0.300. L in the figure below = 0.333 m. 1. What maximum distance does the spring compress through?

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