A yo-yo (with inner radius r-0.5in and outer radius ro-1.5in) rests against a wall while its string is attached to the top of the wall as shown. Find the minimum coefficient of friction to prevent slip. The yo-yo weighs 0.3lbs. 300
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- (a) When opening a door, you push on it perpendicularly with a force of 44.0 N at a distance of 0.780 m from the hinges. What torque (in N-m) are you exerting relative to the hinges? (Enter the magnitude.) N-m (b) Does it matter if you push at the same height as the hinges? O Yes O NoTo loosen the lid on a jar of jam 7.6 cm in diameter, a torque of11 N # m must be applied to the circumference of the lid. If a jarwrench whose handle extends 15 cm from the center of the jar isattached to the lid, what is the minimum force required to openthe jar?A rod with a length L = 1.0 m long and a mass of 6.0 kg is pivoted around its center. A force of magnitude F = 5.0 N and angle 30° is applied at one end of the rod. A second force of magnitude F/2 is applied 0.25 m from the pivot at an angle of 53° as shown below. F 30⁰ m 53⁰ -pivot F/2 L/2 What is the magnitude of the angular acceleration due to the applied forces? L/4
- The center of gravity of Kelly's outstretched arm is located 21 cm from the axis of rotation in her shoulder. Her arm has a mass of 4.2 kg and is 56 cm long. Assuming the deltoid's force is horizontal, what is the magnitude of the force her deltoid muscle must exert on Kelly's upper arm so she can hold a 6.0 kg mass stationary 15 degree above the horizontal as shown? Her deltoid muscle attaches to her upper arm at a point 18 cm from her shoulder joint. 6 kg 15° 21 cm FdeltiodA uniform 10.0 m ladder of weight WL=375 N leans against a frictionless wall. There is a force of static friction between the floor and the bottom of the ladder. A person weighing Wp stands 7.4 m between the bottom of the ladder. Draw a free body diagram for the ladder. Draw a torque diagram for the ladder. Determine the force that the wall exerts on the top of the ladder. Determine the force of static friction exerted on the ladder by the floor.A uniform 8.00 m, 1500 kg beat is hinged to a wall and supported by a thin cable attached 2.00 m from the free end of the beam. The beam is fixed to the wall by a hinge at an angle of 30.0 degrees above the horizontal. The angle between the cable and the beam is 40 degrees. What is the direction of the torque exerted by the beam around the point where the cable is attached? -clockwise -counterclockwise