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Compare the tension in the coupling betwenn the first two and the last two cars of a train when the trains speed is constant
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Question: An object of mass m attached to a spring of force constant k oscillates with simple harmonic motion. The maximum displacement from equilibrium is A and the total mechanical energy of the system is E. What is th ...
Swimming at 1.50 m/s relative to still water, a swimmer heads directly across a river of width 80 m. He arrives 45.0 m downstream from the point directly across the river from his starting point. (a) What is the speed o ...
Question: Somebody on reddit posted a ridiculous picture today of a fly pierced onto a needle of a cactus: Whilst the OP claims the picture to be real, several people doubted the fly could ever reach enough momentum to a ...
Question: Suppose the emf generated by a coil rotating in a magnetic field is zero at t=0 and increases to its first peak at to=0.11 ms. When is the emf first one-fourth of its maximum, in seconds? When is the emf next o ...
Question: A student standing in a canyon yells "echo," and her voice produces a sound wave of frequency of f = 0.56 kHz. The echo takes t = 3.5s to return to the student. Assume the speed of sound through the atmosphere ...
Question: Part A: How much time does it take light to travel from the moon to the earth, a distance of 384000 km ? Express your answer in seconds to three significant figures. Part B: Light from the star Sirius takes 8.6 ...
Qustion: A pendulum is made by tying a 590 g ball to a 45 cm-long string. The pendulum is pulled 22o to one side, then released. Part A: What is the ball's speed at the lowest point of its trajectory? Part B: To what ang ...
Question: In short-track speed skating, the track has straight sections and semicircles 16 m in diameter. Assume that a 64kg \;kg skater goes around the turn at a constant 11m/s Part A: What is the horizontal force on th ...
The first modern Olympics of 1896 had a marathon distance of 40 km. In 1908, for the Olympic marathon in London, the length was set at 42.195 km to provide the Royal Family with a better view of the race. Other distances ...
Question: The position of a 2.75 x 10 5 N training helicopter under test is given by r? = (0.020 m/s3) t3i^ + (2.2m/s)tj^ ?(0.060m/s2)t2k^. Part A: Find the net force on the helicopter at t = 5.0s. Express your answer in ...
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