College Physics
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ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A 1.08 kg mass is attached to a spring of force constant 10.8 N/cm and placed on a frictionless surface. By how much will the spring stretch if the mass moves along a circular path of radius 0.495 m at a rate of 2.06 revolutions per second?
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- Please help mearrow_forwardA 250 g piece of kryptonite is attached to a 90 cm long masless string to form a pendulum. At its highest point (Point A) the string makes an angle of 55 degrees with the vertical. Its lowest point is Point B and Point C is where the string makes an angle of 35 degrees with respect to the vertical. Find the tension in the string and angular acceleration of the rock at (a) Point A, (b) Point B and (c) Point C. (a) Draw a free body diagran of the kryptonite, including all relevant angles and axes at Point A, Point B, and Point C. (Three total FBD) (b) Find the angular speed, angular acceleration and tension in the string at Point A. (c) Find the angular speed, angular acceleration, centripetal force and tension in the string at Point B. (d) Find the angular speed, angular acceleration, centripetal force and tension in the string at Point C.arrow_forwardGold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.100 μm, what is the length of the fiber?arrow_forward
- Two masses, m1 and m2, are attached to a 1.95-m-long steel wire which runs over a light, frictionless pulley as shown. Assume the cross section of the wire is circular with a diameter of d = 4.00 mm, m1 = 3.30 kg, and m2 = 4.90 kg. The masses are released from rest and allowed to move freely. Compared with its length before the masses were attached, by how much has the wire stretched (in mm) while the masses are in\arrow_forwardIn the figure, a uniform sphere of mass m = 0.783 kg and radius r = 0.394 m is held in place by a massless rope attached to a frictionless wall a distance L = 1.58 m above the center of the sphere. Find (a) the tension in the rope and (b) the force on the sphere from the wall. L. (a) Number i Units (b) Number i Unitsarrow_forwardA 18.5 kg door that is 1.02 m wide opens slowly as a pull of constant magnitude 53.3 N is exerted on the doorknob. This applied force, which is always perpendicular to the door, is necessary to balance the frictional torque in the hinges. How large must an applied force of constant magnitude be in order to open the door through an angle of 90.0° in 0.474 s?arrow_forward
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