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A 50 kg person stands at the edge of a 7.4 m diameter circular platform, which is mounted horizontally on frictionless bearings and has a total mass of 300 kg. The platform is at rest initially, but when the person begins running at a speed of 10 m/s (with respect to the platform) around its edge, the platform begins to rotate in the opposite direction. What is the magnitude of the speed of the person (in m/s) with respect to the ground? You can model the platform as a circular disk.
a particle with mass 2.30 g and charge 10.0 c enters through a small hole in a metal plate with a speed of 8.50 ms at
A parallel-plate capacitor has fixed charges +Q and -Q. The separation of the plates is then doubled. (a) By what factor does the energy stored in the electric field change? (b) How much work must be done in doubling the plate separation from d to..
A uniform plate of height 1.920 m is cut in the form of a parabolic section. The lower boundary of the plate is defined by: y = 1.000 x2. The plate has a mass of 1.17 kg.
Gas in a cylinder similar to the one shown in the figure moves a piston with area 0.223 m2 as energy is slowly added to the system. find the displacement of the piston
An ideal spring with a spring constant of 25.0 N/m is suspended vertically. A 1.00 kg object is attached to the unstretched spring and released. It then performs oscillations in the form of simple harmonic motions. Determine the magnitude of the o..
A bowling ball of mass M and Radius R (treated as a solid sphere) is thrown along a level surface so that initially (t = 0) it slides with a linear speed Vo but dows not rotate, How long does it take to begin rolling without slipping
Suppose you walk into a sauna that has an ambient temperature of 50.0 C. Calculate the rate of heat transfer to you by radiation given your skin temperature is 37.0 C
A 1.5kg- block of ice is initially at a temperature of -7.0C a)If 2.6×10^5J of heat are added to the ice, what is the final temperature of the system? b)Find the amount of ice, if any, that remains.
What is the frictional force
A proton moves perpendicular to a uniform magnetic field, B, at 1.6 multiplied by 107 m/s and experiences an acceleration of 1.8 multiplied by 1013 m/s2 in the positive x direction while its velocity is in the positive z direction. Find out the magni..
A mass m is gently placed on the end of a freely hanging spring. The mass then falls 32.0 cm before it stops and begins to rise. What is the frequency of the oscillation
A block of mass 2.50 kg is pushed 3.00 m along a frictionless horizontal table by a constant 18.0 N force directed 25.0° below the horizontal. Determine the work done by the net force on the block
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