Q16 A car is moving around a horizontal circular track which is banked as shown. Its speed is constant and it stays at the same height on the track as it moves. Which arrow represents the net force acting on the car? B (A) A (В) В (С) С (D) D
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- For the conical pendulum shown below, the bob moves in a horizontalcircle of radius 0.1 m, at a constant speed v. The mass of the bob is 81 g. The cord sweeps a cone that makes an angle 31.5 o with respect to the vertical. The x and y axes are shown in the figure with positive x pointing towards the center of the circle and positive y pointing upwards. c) Calculate the tension T in the string. d) Calculate the speed v of the bob.A car of mass m is rounding a banked curve with radius R and banking angle 0. The curve is icy, so there is no friction between the tires and the surface. At what speed must the car take the turn in order for it not to slide up or down the incline? R Top View. Gravity is into the paper. √8 g Side View. The velocity is into the paperA 4.70-kg object is attached to a vertical rod by two strings as shown in the figure below. The object rotates in a horizontal circle at constant speed 5.95 m/s. (3.00 m 2.00 m m 2.00 m (a) Find the tension in the upper string. N (b) Find the tension in the lower string. N Ⓡ
- 1. 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…12M2 M, M, a = 40° The system of objects is on an inclined plane with a slope (a=40°); M1 = 5.0 Kg; M2 = 5.5 Kg; M, = 9.5 Kg coefficient of plane friction u= 0.5 perfectly smooth ideal pulley; g = 9.8 m/s?. Calculate the acceleration of the system and the tension in the ropes (T12) and (T23)? What are the dynamics of this system of objects? If M3 = 15 kg, calculate like the question above?
- Part 1: 1. What is providing the centripetal force in Part 1? 2. How should the slope relate to the values of the mass of the rotating object, m and the radius of the circular path, r? Ia The deflection of the needle would decrease. b The deflection of the needle would increase. c The needle would return to its rest position. d The needle would deflect in the opposite direction.B-D please Could you let me know weather or not the FBD is correct?
- d) At what rate does the cylinder spiñn 2 (8.51). In the amusement park ride shown here, the passengers are against the wall of a cylinder that rotates vertically. The diameter of the cylinder is 16 m. The cylinder rotates once every 4.5 sec. a) Draw a force diagram for a 55-kg passenger at the top of the ride. Show the weight and normal force vectors. b) What is the normal force? How many "g's" will the passenger feel? c) Draw a force diagram for a 55-kg passenger at the bottom of the ride. Show the weight and normal force vectors. ) What is the normal force? How many “g's" will the passenger feel? ation e the ride above is going at the minimum speed for passengers not to fall off. peed, what would the normal force be on a passenger at the top? What would thI Revie A racetrack curve has radius 80.0 m and is banked at an angle of 15.0°. The coefficient of static friction between the tires and the roadway is 0.400. A race car with mass 1200 kg rounds the curve with the maximum speed to avoid skidding. Part A As the car rounds the curve, what is the normal force exerted on it by the road? Express your answer with the appropriate units. ? n = Value Units Submit Request Answer Part B What is the car's radial acceleration? Express your answer with the appropriate units. Arad = Value Units Submit Request AnswerPart A If a curve with a radius of 98 m is properly banked for a car traveling 73 km/h , what must be the coefficient of static friction for a car not to skid when traveling at 94 km/h ? Express your answer using two significant figures. Π ΑΣΦ ? Umin =