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Problem: A horizontal 781 N merry-go-round of radius 1.75 m is started from rest by a constant horizontal force of 75 N applied tangentially to the merry-go-round. Find the kinetic energy of the merry-goround after 3.97 s. The acceleration of gravity is 9.8 m/s 2. Assume the merry-go-round is a solid cylinder. Answer in units of J.
A constant 0.350 T magnetic field is perpendicular to the plane of a loop with radius 1.2 centimeter. Evaluate what the flux through the loop
a 7.0 N force is applied horizontally on a book that weighs 20N that is resting on a tabletop. If µs=.50 between the book and table, find the force of static friction on the book
A father and a daughter balance a teeter-totter to illustrate the principle of the lever. If the father whose weight is 150 N is 8 m from one end, how far away on the opposite side of the fulcrum should the 50-N daughter stand to balance the teeter-t..
An astronomical telescope has
A 1000kg car traveling at a speed of 40m/s skids to a halt on wet concrete where the friction force is 6000N
A ball thrown straight upward returns to its original level in 2.40. What is the initial speed of the second ball if it also returns to its original level in 2.40
A spectral line of sodium normally has a wavelength of 5890Angstroms. The same line measured in the spectrum of a star is at awavelength of 5625 Angstroms. At what speed in the star traveling? Is the star moving towards us or away from us?
A cart moving horizontally along a straight line with constant speed of 30 m/s. A projectile is fired from the moving cart in such a way that it will return to the cart has moved 80 m. At what speed (relative to the cart) and at what angle (to the..
A sensitive gravimeter at a mountain observatory finds that the free fall acceleration is 6.0 × 10-3 m/s2 less than that at sea level. Find what is the observatory altitude in meters
Two points charge of equal magnitude are 0.083m apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 51 N/C. Find the magnitude of the charges.
a 1.50-microf capacitor charged to 40.0 v and a 2.40-microf capacitor charged to 15.0 v are connected to each other
1 a bug is on the rim of a disk of diameter 14 in that moves from rest to an angular speed of 78 revmin in 4.4 s.a.
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