An old streetcar rounds a flat corner of radius 6.90 m, at 12.0 km/h. What angle with the vertical will be made by the loosely hanging hand straps?
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An old streetcar rounds a flat corner of radius 6.90 m, at 12.0 km/h. What angle with the vertical will be made by the loosely hanging hand straps?
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- A 1200-kg car rounds a corner of radius r = 45 m. If the coefficient of static friction between the tires and the road isms = 0.82, what is the greatest speed the car can have in the corner without skidding?To avoid accident in the road, the minimum velocity with which a car driver must traverse a curve of radius 150m and coefficient of friction 0.6 to avoid skidding is?A gear of radius 12 cm is used to turn a gear of radius 7 cm. If the larger gear turns through 400°, through what angle does the smaller gear turn?
- Engineers who design roads typically “bank” (incline) curves in such a way that a car traveling at the recommended speed does not have to rely on friction between its tires and the road in order to round the curve. Suppose the radius of curvature of a road segment is 55 m, and the recommended speed is 45 km/hr. At what angle should the curve be banked?At what angle 8 must the 800-lb force be applied in order that the resultant R of the two forces has a magnitude of 20( lb? For this condition, determine the angle B between R and the vertical.An airplane is flying in a horizontal circle at a speed of 480 km/h. If its wings are tilted at angle u = 40to the horizontal, what is the radius of the circle in which the plane is flying? Assume that the required force is provided entirely by an “aerodynamic lift” that is perpendicular to the wing surface.