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Common Forces
A leg is suspended in a traction system, as shown below (a) Which pulley in the figure is used to calculate the force exerted on the foot? (b) What is the tension In the rope? Here
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- Two boxes, A and B, are at rest Box A is on level ground, while box B rests on an inclined plane tilted at angle with the horizontal. (a) Write expressions for the normal force acting on each block (b) Compare the two forces; that is, tell which one is larger or whether they are equal in magnitude. (c) If the angle of incline is 10 , which force is greater?arrow_forwardYou press your physics textbook flat against a vertical wall with you hand, which applies a normal force perpendicular to the book. What is the direction of the friction force on the book due to the wall? (a) downward (b) upward (c) out from the wall (d) into the wallarrow_forwardView Policies Current Attempt in Progress In the figure, a crate of mass m - 120 kg is pushed at a constant speed up a frictionless ramp (0-30°) by a horizontal force F. The positive direction of an x axis is up the ramp, and the positive direction of a y axis is perpendicular to the ramp. (a) What is the magnitude of F? (b) What is the magnitude of the normal force on the crate? (a) Number i Units (b) Number Units Save for Later Attempts: 0 of 4 used Submit Answer Using multiple attempts will impact your score. 10% score reduction after attempt 3arrow_forward
- (Newton's laws and their applications) A block with mass m1 slides down an inclined plane whose angle is 22 °, the coefficient of kinetic friction between the block and the plane is 0,250. The block is attached to an ideal rope that passes through two ideal pulleys until it is attached to a fixed support, as shown in figure 3. A rope leaves the axis of the movable pulley up to a block of mass m2 3 m2 m1 Figure 3. Diagram of exercise 3 A. Discuss what difference the exercise will make if one more pulley is placed on the ceiling that makes the rope connect to the rod of the movable pulley.arrow_forwardPage Insert Table Chart Text Shape Media Comment V. Does kinetic friction depend on area of contact? 15. Make a prediction. If the area of contact increases, does the kinetic friction increase, decrease or stay the same? Give a reason for your prediction. 16. Test the Larger Area. Two sides of the block are covered in the material assigned to your group. Remove the masses from the end of the string and place a 70g mass on the string. Place the larger of the two sides on the track. Repeat the experiment as in Part I. 17. Test the Smaller Area. Place the smaller of the two sides on the track. The height of the pulley may need adjusting so the string is horizontal with the track. Repeat the experiment. Area Dependence Hanging Mass Block Mass Area Size Acceleration m M (kg) (kg) (m/s2) Larger Area 0.070 134 0.6534 Smaller Area 0.070 .134 0.9387 18. Calculate the kinetic frictional force for each trial. 19. Does kinetic friction depend on the area of contact? If the frictional forces…arrow_forwardTraction After a skiing accident, your leg is in a cast and supported in a traction device, as shown in the figure. (Figure 1) Part A Find the magnitude of the force F exerted by the leg on the small pulley. (By Newton's third law, the small pulley exerts an equal and opposite force on the leg.) Let the mass m be 2.27 kg. ? F = N Submit Request Answer Provide Feedback Next > Figure Small pulley 30.0 30.0arrow_forward
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- Common Forces A leg is suspended in a traction system, as shown below (a) Which pulley in the figure is used to calculate the force exerted on the foot? (b) What is the tension in the rope? Here is the tension, w leg is the weight of the leg, and w is the weight of the load that provides the tension. 1 Ť Wieg पं 11 11 2 a A w = mg 3 10 5arrow_forwardYour company needs to move a granite rock up a 15° inclined plane out of a query and to lower the dirt into the mine field to fill the holes. Your team designed a frictionless system consisting of granite-filled cart & dirt- filled bucket connected by a cable that passes through a massless pulley as shown in the figure below. The weight of the granite-filled cart is w1 and the direction of the positive forces is indicated by the long arrow. Cart a Bucket 15° © 2016 Pearson Education, Inc.arrow_forwardInclined plane Suppose that a box is being towed up an inclined plane as shown in the figure. Find the force w needed to make the component of the force parallel to the inclined plane equal to 2.5 lb.arrow_forward
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