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A car traveling on a road at a speed of 70km/h exits onto an ice-covered exit ramp. wishing to stop , he applies his brakes until his automobile comes to rest .knowing that the magnitude of the total acceleration of the automobile cannot exceed 10 ft/s^2, determine the minimum time require for the automobile to come to rest and the distsnce it travels on the exite ramp during that time if the exit ramp (a) is straight (b) has a constant radius of curvature of 800 ft.
Solve each part assuming that the driver applies his brakes so that dv/dt , during each time interval , (1)remains constant ,(2) varies linearly ?
A bullet with mass m=9.5 gram and initial velocity v=630 m/s is fired into a block (mass M = 5.4 kilogram) that is hung by two strings. Consider the conservation of linear mo
A small current element at the origin has a length of 1.2 mm and carries a current of 3.9 A in the +z direction. Find the magnitude and direction of the magnetic field due t
A piñata of mass 3.50 kg is attached to a string tied to a hook in the ceiling. What is the work done by gravity by the time the string is in a vertical position for the first
A ball player hits a home run, and the baseball just clears awall 20.6 m high located 131.0 m from home plate. The ball is hit at an angleof 35° to the horizontal, and airre
A freshly prepared sample of a certain radioactive isotope has an activity of 10.0 mCi. After 4.50 h, the activity is 7.80 mCi. Find the decay constant and half-life of the is
A hot air balloon rises from the ground with a velocity of 1.8 m/s.A champagne bottle is opened to celebrate takeoff, expelling thecork horizontally with a speed of 4.0 m/s.
A plane of a 5.0 cm x 8.0 cm rectangular loop of wire is parallel to a 0.19 T magnetic field. The loop carries a current of 6.2 A. What is the magnetic moment of the loop
Some believe that the positions of the planets at the time of birth influence the newborn. Calculate the gravitational force exerted on the baby by the planet Jupiter (m=1.9*
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