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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 boy of mass 35 kg and a girl of mass 40 kg are skating towards each other with speeds of 2.5 m/s, and 2.0 m/s respectively. Assume that there is no friction, and find their combined velocity after they meet
A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 55.5 m/s and returns the shot with the ball traveling horizontally at 36.0 m/s in the opposite direction. find the impulse delivered to the ball by the tennis racq..
A uniform 5.50kg square solid wooden gate 2.00mon each side hangs vertically from a frictionless pivot at the center of its upper edge. What is the angular speed of the gate just after it is struck by the unfortunate raven
A capacitor with air between its plates is charged to 100 V and then disconnected from the battery. When apiece of glass is placed between the plates, the voltage across thecapacitor drops to 30 V.
a coal-fired electric power plant has an overall efficiency of 28 and an output of 1845 megawatts. how many tera joules
dry air had a co2 mole fraction of 0.00038 in 2007 compared with 0.00032 in 1965. calculate the total mass of co2 that
Two speakers, one directly behind the other, are each generating a 429-Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Take the speed of ..
a magnetic field is perpendicular to .04 by .06 m a rectangular coil of wire that has one hundred turns in a time of .05s, Calculate the change in the magnetic field
If we do that much work on an electron, what will its final speed actually be
a block of mass 3 kg is moved up an incline that makes an angle of 37 with the horizontal under the action of a
Neutron stars consist only of neutrons and have unbelievably high densities. Calculate the density of such a star
Two point charges, +5.0 µC and ?2.0 µC, are separated by 4.0 m. What is the electric potential energy
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