[طاليه علم]

انا عندي امتحان بكره وما اعرف حل المسائل هذه ممكن حد يساعدني ويقولي على الحل



A 1 500-kg car moving on a flat, horizontal road negotiates a curve, as shown in Figure 6.5. If the radius of the curve is 35.0 m and the coefficient of static friction between the tires and dry pavement is 0.500, find the maximum speed the car can have and still make the turn successfully.

What If? Suppose that a car travels this curve on a wet day and begins to skid on the curve when its speed reaches only 8.00 m/s. What can we say about the coefficient of static friction in this case?








pendulum consists of a sphere of mass m attached to a light cord of length L, as shown in Figure 8.7. The sphere is released from rest at point Awhen the cord makes an angle θAwith the vertical, and the pivot at P is frictionless.

(A) Find the speed of the sphere when it is at the lowest point B.

(B) What is the tension TB in the cord at B?