21. Cooking an omelet on a boat is tricky because the tilting of the boat can cause the omelet to slip off the flat griddle. If the coefficient of static friction between the omelet and the griddle is 0.05, what is the largest angle (measured from the horizontal) that the griddle can tilt before the omelet starts to slide? A) 3° B) 6° C) 9° D) 12° E) 15°
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- Help1. A racing bicycle with rider has a combined mass of 85 kg. The racer is on a velodrome (circular racing track) that has banked curves. The surface is banked at an angle of 35° from horizontal. The track has a radius of 60 m. a) Draw a free-body diagram of the racer viewing the racecar from the front (left) and from above (right.) Ignore friction. Indicate the direction of the acceleration of the racer next to your diagram. b) Based on your free-body diagram do you think the car could possibly stay on a circular path (the track) without friction? Explain. c) Which of the forces you drew has a component in the same direction as the acceleration? Explain. d) Write down your force equations and solve for the acceleration of the racer moving at a constant speed around the track with no friction. (Hint: Use the direction of the acceleration as one of your axes. Do not use along-the-incline and perpendicular-to- the-incline as your axes.) e) What speed would the racer have with this…3. A car of mass m is traveling along a circular track of radius r with a constant speed v. Determine the minimum coefficient of static friction between the tires and the track required for the car to remain in circular motion if: a. the track is flat. b. the track has an angle
- 2. A car making a turn on a banked highway ramp is experiencing friction. The coefficient of static friction between the tires and the road is 0.25. Determine the maximum speed at which the car can safely negotiate a turn of radius 2.7 x 102 m with a banking angle of 15.0°. Draw the necessary FBD.CM4: A 58 kg circus performer hangs from a bar suspended from a ceiling as shown in the figure. If the bar masses 12 kg (and its weight acts at its center) and has a length of 1.4 m, what is the tension T₂ in the rope? The rope is attached 0.85 m along the bar. تل T₂ 50°2. A block of mass 3.00 kg is pushed up against a wall by a force P that makes a 50.0° angle with the horizontal as shown in the figure. The coefficient of static friction between the block and the wall is 0.250. Determine the possible values for the magnitude of P that allow the block to remain stationary 50.0° P
- 9. Two blocks are positioned on surfaces, each inclined at the same angle of 58.3 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 3.66 kg, and the coefficient of kinetic friction for both blocks and inclines is 0.460. Assume static friction has been overcome and that everything can slide. What is must be the mass of the white block if both blocks are to slide to the LEFT at an acceleration of 1.5 m/s^2? 2.16 kg 9.99 kg 6.02 kg 3.06 kg3. At the August Dutchess County Fair, 8 children, each 40 lbs, travel counterclockwise on a Ferris wheel with a 5 m radius. The wheel rotates with uniform speed, making one full turn every 10 seconds, and the children are each in contact with only a flat bench that can exert both frictional and normal forces. Specify the magnitude (in Newtons) and direction (up, down, left, right) of each contact and non-contact force acting on B) A) The child at the bottom of the wheel. B) The child at the top of the wheel. C) The child halfway down from the top of the wheel. D) The child halfway up to the top of the wheel. A)9) Two blocks are positioned on surfaces, each inclined at the same angle of 48.2 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 2.62 kg, and the coefficient of kinetic friction for both blocks and inclines is 0.250. Assume static friction has been overcome and that everything can slide. What is must be the mass of the white block if both blocks are to slide to the LEFT at an acceleration of 1.5 m/s^2? Question 9 options: 1.12 kg 6.55 kg 4.11 kg 2.49 kg 10) Two blocks are positioned on surfaces, each inclined at the same angle of 50.3 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black…
- Q4) The Great Valerio is performing his high wire act. He stands on a (massless wire) exactly in the middle of two posts a distance d = 50.1 m apart. The wire buckles under his weight and he ends up h = 1.25 m below the vertical location where %3D the wire is attached to the posts. Valerio has a mass of my= = 73.5 kg. What is the tension of the wire ? h d/2 d/2 ECurrent Attempt in Progress A child places a picnic basket on the outer rim of a merry-go-round that has a radius of 5.0 m and revolves once every 27 s. (a) What is the speed of a point on that rim? (b) What is the lowest value of the coefficient of static friction between basket and merry-go-round that allows the basket to stay on the ride? (a) Number i (b) Number i Units Units