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A boy weighing 400 N swings from a tall rock at the end of a vine 3 m long. The vine makes a 60 degrees angle with the vertical. As the boy swings down, the vine will break if the force on it exceeds 600 N. Calculate the tension in the cord. Does the vine break? Support your answer with formulas and numbers.
A train is moving parallel and adjacent to a highway with a constant speed of 23 m/s. What is the speed of the car just as it passes the train
What is the coefficient of kinetic friction?
Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of human hearing) for a period of 9.00 hours
A flight attendant pulls her 70 N flight bag a distance of 378 m along a level airport floor at a constant velocity. Find the work she does on the flight bag
Two identical masses m are initially at rest, a distance x apart. A constant force F accelerates one of them toward the other until they collide and stick together. What is the (rest) mass of the resulting particle?
A circular coil of wire with 54 turns and a radius of 45 cm is laying flat on a horizontal table, compute the magnitude of the magnetic flux through the coil
Is there enough energy to completely vaporize all of the water?
A transverse wave on a string has an amplitude of 0.223 m and a frequency of 194 Hz. How much time passes between the first two instants when this particle has a displacement of y = 0.114 m
What is the minimum acceleration that the jet has to have in order to take off before it reaches the end of the runway - How far does the bicycle travel before coming to a stop?
A rectangular copper strip 1.5 cm wide, 0.1 cm thick carries a current of 5 A. A 1.2 T magnetic field is applied perpendicularly to the strip. Find the Hall voltage that should be produced
A +21 nC charge is at the origin. How much farther from the charge is the 2000 V equipotential surface than the 3000 V surface? (What is the change in r?)
three identical thin rods each of length l and mass m are welded perpendicular to one another as shown in figure
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