Problem 5. The seaman pulls with 100-N force and wants to stop the motorboat from moving away from the dock under power. How few wraps n of the rope must he make around the post if the motorboat develops 3500 N of thrust and the coefficient of friction between the rope and the post is 0.2?
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- A light rope is attached to a block with mass 4.00 kg that restson a frictionless, horizontal surface. The horizontal rope passes overa frictionless, massless pulley, and a block with mass m is suspendedfrom the other end. When the blocks are released, the tension in therope is 15.0 N. How does the tension compare to the weight of the hanging block?A light rope is attached to a block with mass 4.00 kg that restson a frictionless, horizontal surface. The horizontal rope passes overa frictionless, massless pulley, and a block with mass m is suspendedfrom the other end. When the blocks are released, the tension in therope is 15.0 N. What is the acceleration of either block?Ed and Al are pushing on a couch as shown in the picture and it doesn't slip. EC Ec Ed is pushing with a force of 362.8 N at an angle of 0 = 50.3 degrees with respect to the vertical and Al is pushing with a force of 126.8 N at an angle of o = 29 degrees with respect to the horizontal. If the couch has a mass of 98 kg and the coefficients of static and kinetic friction between the couch and the floor are ug = 0.52, and u = 0.39, what is the magnitude of the force of friction exerted by the floor on the couch? Click here for a hint F =
- 1 m A 10.3 m D B Figure 5This problem concerns the concept of tension in a rope. Consider a rope subjected to a pulling force on its two ends as shown in (Figure 1). The rope is stationary. An arbitrary point P divides the rope into a left-hand segment L and a right-hand segment R. Figure wi L pull R 232 pull 1 of 3 Part A For segment R and segment L to hold together, they must exert forces on each other. What is the direction of the force exerted on segment R by segment L? View Available Hint(s) left right Submit Part B FLR Assume that segment R exerts a force of magnitude T' on segment L. What is the magnitude FLR of the force exerted on segment R by segment L? Give your answer in terms of T and other constants such as g. ► View Available Hint(s) = Submit % ΑΣΦ www ?A toy airplane has mass 1.5 kg and can produce a thrust of 5.0 N from the engine and propeller. It is tied to the ceiling by a light rope (negligible mass) and the engine is turned on. If the plane remains horizontal, what angle does the rope make with the vertical?
- An 85 kg man tries to pull himself up the face of a boulder using a rope hooked to a tree above it. The face of the boulder created a 50.0° angle with the horizontal. If the coefficient of friction between his shoes and the boulder is 0.350, will he make it up if he pulls with 550. N of force? Remember his shoes will try to slip backwards when considering friction.Three objects are connceted by a massless wires over a frictionless pulley. The right side of the pulley wire is connected to a 15kg block and right below that is a 10kg block on the bottom of the wire. The tension in the wire connecting the 10kg and 15kg objects is measured to be 133 N. What is the weight of the unknown mass on the left side of the pulley or other side of the pulley?The upper leg muscle (quadriceps) exerts a force of 1350 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in Figure 5.43. Find the magnitude and direction of the force exerted by the kneecap on the upper leg bone (the femur). (counter-clockwise from an axis directed to the left) X N X Figure 5.43 Fo
- A box weighing 50 N rests on a horizontal surface. A person pulls with a force of 10N to the right and it does not move. In order for you to move, you need another person who pulls vertically. What is the minimum force that the other person needs to exert in order for it to move? Coefficient of static friction = 0.4On her way to visit Grandmother, Red Riding Hood sat down to rest and placed her 1.20 kg basket of goodies beside her. A wolf came along, spotted the basket, and began to pull on the handle with a force of 6.40 N at an angle of 25 degree with respect to vertical. Red was not going to let go easily, so she pulled on the handle with a force of 12.2 N. If the net force on the basket is straight up, at what angle was Red Riding Hood pulling from the vertical?A horizontal force F pushes against a block of mass m. The mass m in turn pushes against a bigger block of mass M. There isn't friction any between the larger block and the table, but there is friction in between the blocks (coef. of static friction is μs). What's the smallest force F that will hold the smaller mass m m against the larger mass M without letting the smaller mass m fall down?