Flying Circus of Physics In the figure, a climber with a weight of 640 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass. The indicated angles are 0 = 5O° and = 30°. If her feet are on the verge of sliding on the vertical wall, what is the coefficient of static friction between her climbing shoes and the wall? Hs =Number i Units
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- An automobile is going up a grade of 15 with an initial velocity of 30 m/s. The coefficient of static friction between the tires and the road is 0.7. a) What minimum distance does it take to stop the car? b) What minimum distance would it take to stop the car if it were going down the grade?A person is pushing a fully loaded 24.55 kg wheelbarrow at constant velocity along a plank that makes an angle a = 43.0° with the horizontal. The load is distributed such that the center of mass of the wheelbarrow is exactly halfway along its L. What is the magnitude of the total force F the person must apply so that the wheelbarrow is parallel to that plank? You may neglect the radius of the wheel in your analysis. The gravitational acceleration is g = 9.81 m/s². F = NDetermine the force P necessary to start the V-shaped wedge to the right if the coefficient of friction is f = 0.445 at each of the three surfaces of contact. WB =1000N WA=200N B 30% 150
- Current Attempt in Progress The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle ((r= 11.0 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.520, and the angle in the drawing is 7.45°. How much time is required for your suitcase to go around once? Assumme that the static friction between the suitcase and the carousel is at its maximum. Number UnitsAn object of mass m is constrained to move on a horizontal frictionless circular track of radius m starts fIrom rest at time t = 0 and thereafter is puushed by an external force with constant magnitude F, always horizontal and tangent to the track. The horizontal component of the force exerted by the track on the object is given by А. О В. F C. Ft/mR D. Ft2/mR E. F/mg ans: DA car making a turn on a dry, banked highway ramp is experiencing friction. The angle of the bank is 40 degrees and the radius of turn is 78 m, what is the coefficient of static friction between the tires and the road if a 1350 kg car safely turn at 45m/s?
- A ladder of weight W stands on a rough floor and rests against a frictionless wall, illustrated above. It is only stable if the angle between the ladder and the ground is greater than theta (theta > 60 degree). a. Find the coefficient of static friction between the floor and the ladder. b. A child of weight 4W places the ladder against the wall at angle 70 degree(theta = 70 degree). Calculate how far up the ladder it is safe for the child to climb.Fans at the Tour de France can be exceedingly annoying, often impeding the cyclists and sometimes causing wrecks. In1994 Laurent Jalabert crashed into a gendarme (policeman) and was seriously hurt.Sometimes riders can stop to avoid a collision, sometimes not. It depends on friction and reaction time. The 95-kg Jalabert was speeding at 40 mph along the level street on a wet day. The coefficient of kinetic friction between his wheels and the road was 0.13. He looked up to see the gendarme about 44 m (about half of a football field) ahead of him. If he has typical human reaction time (0.15 s), how close will he be to the gendarme when he begins to apply the brakes? Round the final answer to two decimal places. As Jalabert skids, what is the magnitude of his acceleration? Round the final answer to two decimal places. How fast was Jalabert going when he hit the gendarme? Round the final answer to one decimal place.A monkey of mass m = 10.0 kg is holding on to two vines each of length l = 3.00 m. The vines form an angle with the horizontal of 40.0 degrees (see figure). The monkey is not moving and the vines are considered massless and not stretchable. a. What is the distance d between the mounting points of the vines at the top? b. Draw a free body diagram of the monkey and indicate all forces.
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