College Physics
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Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Two masses of 8kg and 2kg are suspended from a light inextensible cord passing over a pulley. The pulley exerts a constant friction on the cord that is equivalent to the force of 3N at the circumference. When the masses are released, the 8kg mass drops while the 2kg mass is pulled up by the cord towards the pulley. Determine the acceleration of the masses
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- A dockworker applies a constant horizontal force of 75.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 12.0 m in 4.8 s. What is the mass (in kg) of the block of ice? (Round your answer to one digit after decimal point)arrow_forwardThe figure below shows an object with mass m = 5.2 kg pulled up a ramp inclined at an angle of 6 = 26° with a force of magnitude F = 32 N parallel to the ramp. F (a) If there is no friction between the object and the ramp, what is the magnitude of the object's acceleration (in m/s )? 1853 m/s2 (b) If instead the coefficient of kinetic friction between the object and the ramp is 0.12, what is the magnitude of the object's acceleration (in m/s-)? m/s2 Need Help? Read It Mewing SaveoWork Revert rO L38: Response 11:49 Type here to search 63°F 10/5/2 prt sc delete home 081 hum ockarrow_forwardΣF=ma Ffr = μFN 1m = 3.3 foot 1m = 0.001km A 100 kg bx rests on a horizontal floor. The coefficient of static friction is us = 0.40, and the coefficient of kinetic friction is uk = 0.10. Determine the force of friction Ffr acting on the box if a horizontal applied force FA is a) 50N and b) 600N. ΣF=mwarrow_forward
- the figure shows two boxes connected by a frictionless pulley ,m1=10 kg, m2=5kg, angle is 60 degrees ,and the coefficient of friction between inclined plane and box m1 is 0.10 .when the system is in motion after being released from rest ,what is the tension in the string and the acceleration of the sysyem?arrow_forwardObjects of masses m1= 4 kg and m2= 9 kg are connected by a light string that passes over a frictionless pulley. The object m1 is held at rest on the floor and m2 rests on a fixde incline of theta = 40 deg. the objects are released from rest and m2 slides 1 m down the incline in 4 s. Determine the acceleration of each object, the tension of the string, and the coefficient of kinetic friction between m2 and the incline. Please explain your thought process while solving the problem.arrow_forwardAs shown, the incline has mass M and is fastened to the stationary horizontal tabletop. The block of mass m is placed near the bottom of the incline and is released with a quick push that sets it sliding upward. The block stops nearthe top of the incline as shown in the figure and then slides down again, always without friction. Find the force that the tabletop exerts on the incline throughout this motion in terms of m, M, g, and θ.arrow_forward
- Two spheres A and B are placed in the arrangement shown below. If mA = 4m and mB = 8m, where on the dashed line should a third sphere C of mass 8m be placed so that the net force on it is zero? (b) If the distance between the two spheres A and B is 500 cm, find the location for the third sphere C so that the net force on it is zero. cm to the right of sphere B *answer for b*arrow_forwardAssume that all quantities are good to 3 significant figures...do not start rounding off too early or too much! All numeric answers should be entered rounded to 3 significant figures and assuming proper SI Units unless otherwise stated. Consider just these 2 forces acting on a mass of 2.79 kg. F1 = 8.36 N @ 21.5 degrees and F2 = 6.80 N @ 76.7 degrees where the angles are measured relative to the +x direction. What is the magnitude of the acceleration produced considering only these 2 forces acting?arrow_forwardThe two masses in the figure are released from rest. After the 5.0 kg mass has fallen 1.5 m, it is moving with a speed of 4.5 m/s. What is coefficient of friction between the table and the 2.0 kg mass? 20 kg 5.0 kgarrow_forward
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