Two window washers, Bob and Joe, are on a 3.00-m-long, 380-N scaffold supported by two cables attached to its ends. Bob weighs 900 N and stands 1.00 m from the left end, as shown in the figure below. Two meters from the left end is the 500-N washing equipment. Joe is 0.500 m from the right end and weighs 800 N. Given that the scaffold is in rotational and translational equilibrium, what are the forces on each cable? left cable KN right cable KN Bob Joe
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- A 27.2 kg door is 209.9 cm tall and 91.5 cm wide. What is the door's rotational inertia about its hinges.A fisherman has a fish hooked on his line. At first, the pole is horizontal, as shown on the left. Later, the fisherman tilts his pole as shown on the right. 2 m- -2 m 20 20 100 N 100 N Consider an axis of rotation that is perpendicular to the page and passes through the center of the fisherman's hand. In which direction does the torque vector due to the fish point? to the right to the left into the page out of the page O There is no torque.A crustacean (Hemisquilla ensigera) rotates its anterior limb to strike a mollusk, intending to break it open. The limb reaches an angular velocity of 175 rad/s in 1.50 ms. We can approximate the limb as a thin rod rotating about an axis perpendicular to one end (the joint where the limb attaches to the crustacean). If the mass of the limb is 28.0 g, the length is 3.80 cm, and the extensor muscle is 3.00 mm from the joint and acts perpendicular to the limb, what is the muscular force required to achieve the blow?
- The distance from the fisherman's hand to the tip of the rod is L = 1.94 m. A fish is on the line, and it pulls the line with a force of F = 110 N at an angle 37.0° below the horizontal. What is the magnitude of the torque (in N · m) exerted by the fish about an axis perpendicular to the page and passing through the fisherman's handI am sitting on a seesaw opposite my young nephew. The seesaw is 14.5 feet long and has a pivot in the middle. I weigh 106.4 lbs while my nephew weighs 34.5 lbs. What is the magnitude of the initial net torque on the seesaw (in ft-Ibs)?A 24.3 kg door is 223.8 cm tall and 91 cm wide. What is the door's rotational inertia about its hinges.
- A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.829 m and 2.71 kg, respectively. When the propellor rotates at 589 rpm (revolutions per minute), what is its rotational kinetic energy ??You are in a tall building located near the equator. As you ride an elevator from the ground floor to the top floor, your tangential speed due to the earth's rotation O increases O decreases O increases when the speed of the elevator increases and decreases when the speed of the elevator decreases does not changeTwo window washers, Bob and Joe, are on a 3.00-m-long, 350-N scaffold supported by two cables attached to its ends. Bob weighs 780 N and stands 1.00 m from the left end, as shown in the figure below. Two meters from the left end is the 500-N washing equipment. Joe is 0.500 m from the right end and weighs 900 N. Given that the scaffold is in rotational and translational equilibrium, what are the forces on each cable? left cable _____ kN right cable _____kN Two window washers, Bob and Joe, stand on a scaffold. The scaffold is 3.00 m long and is supported by two cables with one on each end. Bob stands 1.00 m from the left end of the scaffold. The bucket is 2.00 m from the left end of the scaffold and Joe stands 0.500 m from the right of the scaffold.
- The figure below shows a fisherman with a fishing pole that makes an angle of 20.0° above the horizontal. The distance from the fisherman's hand to the tip of the pole is L = 1.89 m. A fish is on the line, and it pulls the line with a force of F = 119 N at an angle 37.0° below the horizontal. What is the magnitude of the torque (in N · m) exerted by the fish about an axis perpendicular to the page and passing through the fisherman's hand?A child jumps to the edge of a carousel, that is in the shape of a circular plate with a radius of 1.3 m and was rotating at an angular velocity of 1.2 s-1 before the chuld jumped on it. The weight of the carousels is 80 kg, the weight of the child is 22 kg. What is their angular velocity after the jump? Later, the child moves closer to the center of the carousel plate by 80 cm. What is the new angular velocity?In the figure, the block has mass m=0.45 kg and the pulley is on a frictionless horizontal axle with radius R=5.35 cm. When released from rest, the cylindrical pulley makes 10 full turns in 4.57 seconds as the block goes down. Find the rotational inertia of the pulley.