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While running, a man dissipates about 0.60 Joule of mechanical energy per step per kilogram of body mass. If a 70 kilogram man develops a power of 76 Watt during a race, determine how fast is the man running? (Assume a running step is 1.5 m long.)
A 49.7 kg sled starts at rest on a horizontal road. The coefficient of kinetic friction between the sled and the road is ?k = 0.247. estimate the work done by the frictional force on the sled
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, where A is a constant. (Use the following as necessary: 0, A, r, and R, as necessary.)
a spherical shell has inner radius rin and outer radius rout. the shell contains total charge q uniformly distributed.
A solid cylindrical disk has a radius of 0.15 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. What is the mass of the disk
The identical twins Speedo and Goslo join a migration from the Earth to Planet X. It is 20.0 light-years away in a reference frame in which both planets are at rest. The twins, of the same age, depart at the same time on dissimilar spacecraft. Speedo..
The bugle and the Bach - Trumpet have no keys and thus play only the natural scale (open pipes). If the lowest note you can play on a bugle is D2 (73.42 Hz), what other notes can you play
A 1meter long rod has a circular cross-section with an area of 2 m^2, How far from the left end is the center of mass of the rod
On a banked race track, the smallest circular path on which cars can move has a radius of 106 m, compute the largest speed at which cars can move on this track without relying on friction
While a hybrid car brakes to come to a stop at a traffic light, describe the energy transfer and materials used to transfer of this energy
A 1kg of ice at -30° C is added to 10 kg of steam at 500°C. answer the following questions, What is the final temperature when the equilibrium is established
The work to required to strech a certain spring by an elongation of 4.00 cm to an elongation of 5.00cm is 30.5 J. (a)is the work required to increase the elongation of the spring from 5.00 cm to 6.00 cm greater than,less than or equal to30.5J?
A charged belt, 50 cm wide, travels at 30 m/s between a sourceof charge and a sphere. The belt carries charge into the sphere ata rate corresponding to 100 μA. Compute the surface chargedensity on the belt.
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