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Speeding ticket? You are driving your car uphill along a straight road. Suddenly you see a car run a red light and enter the intersection just ahead of you. You slam on your brakes and skid in a straight line to a stop, leaving skid marks 5 feet long. A policeman observes the whole incident and, much to your shock, gives you a ticket for exceeding the speed limit of 80 mph. When you get home, you consult your Physics notes and estimate that the coefficient of kinetic friction between your tires and the road was 2 and the coefficient of static friction was 1. You estimate that the hill made an angle of 40 degrees with the horizontal. You look up in your owner's manual and find that your car weighs 3000 lb. Will you fight the traffic ticket in court?
A roller coaster starts from rest at top of a hill 70.0 mhigh. The car travels to the bottom of the next hill measuring 10.0m high. If the mass of the car is 725kg. how fast the car moving atthe top of the 10.0 m hill, if friction is ignored.
An outside loudspeaker (considered a small source) emits sound waves with a power output of 90 W. Find the intensity level in decibels at that distance
A 17-{\rm m}-long vine hangs verticallyfrom a tree on one side of a 10-{\rm m}-wide gorge, At what minimum speed must he be running
In moving a 45.0kg desk from one side of a classroom to the other, a professor finds that a horizontal force of 295N is necessary to set the desk in motion, What is the coefficient of static friction between the desk and the floor
At a certain instant, a particle of charge q=26mC is traveling with a velocity of 200m/s to the left. 1 mC=1 x 10-6. What is the magnitude and direction of the magnitude force on the charge
A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. find the speed of the ball just before it lands
Two parallel plates have a capacitance of 1.0 µF when they are 1.0 mm apart. The plates are then fully charged by a 9.0 V battery, What is the constant electric field strength between the plates
two identical 21.6-kg spheres of radius 14 cm are 29.8 cm apart center-to-center distance.a if they are released from
A 0.655kg stone is moving in a vertical circular path attached to a string that is 68.0cm long. The stone is moving around the path at a constant frequency of 2.35 rev/sec. Find the tension in the string at the lowest point, and the highest point.
A sprinter explodes out of the starting block with an acceleration of +3.5 m/s2, which she sustains for 1.0 s. What is her velocity at the end of the race
A student presses a book between his hands, as the drawing indicates. What is the magnitude of the minimum pressing force
If the x component of a vector, in the xy plane, is half as large as the magnitude of the vector, Find the tangent of the angle between the vector and the x axis
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