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A playground ride consits of a disk of mass M = 47kg and radius R = 1.6 m mounted on a low friction axle. A child of mass m = 18kg runs at speed v =2.7 m/s on a tangential to the disk and jumps onto the outer edge of the disk. (a) What was the speed of the child just after the collision ? (b)what was the speed of the center of mass of the disk just after the collision ? (c) what was the magnitude of the linear momentum of the disk just after the collision?
The two 10-cm-long parallel wires are divided by 5.0 mm. For what value of the resistor will the force between the two wires be 1.08×10-4 N.
question1reduce equations of motion to an equivalent one-dimensional problem and discuss qualitative nature of the
A stunt car driver negotiates the frictionless track shown in such a way that the car is barely on the track at the top of the loop. The radius of the track is 9.9 m and the mass of the car is 1800 kg. Find the force of the car on the track when the ..
Two charges are fixed on the x axis: one with a charge of = 5.00 at = -1.00 and the other with a charge of = 3.00 at = 1.50 . Find the force exerted on a charge = -5.00 placed at the origin (x=0). What are the magnitudes of the three charges q, q1..
A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 255 keV. What was the wavelength of the photon
A Japan Airlines Boeing 747 accelerates from rest to lift-off speed of 78.51 m/s in 28.20 s. What is the mass of the plane
A cosmic-ray proton in interstellar space has an energy of 21.5 MeV, What is the magnetic field in that region of space
50j of work are done per cycle on a refrigerator with a coefficient of performance of 5.0. Part A: How much heat is extracted from the cold reservoir per cycle
A 1200 kg ore cart is rolling at 10.8 m/s across a flat surface. A crane dumps 493 kg of ore (vertically) into the cart. How fast does the cart move after being loaded with ore? Assume that frictional forces with the flat surface may be neglected.
A roller coaster starts from rest at the top of an 18m hill. The car travels to the bottom of the hill and continues up the next hill that is 10.0m high
What is the net upward force on an airplane wing of area 21.9 m2 if the speed of air flow is 293 m/s across the top of the wing and 278 m/s across the bottom
q1. three identical train cars coupled together are rolling east at 1.2 ms. a fourth car travelling east at 4.4 ms
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