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A dog and a sled are moving due east together with a velocity of 20m/s ( Vi= 20 m/s ). The dog (with a mass of 20 kg, or Md= 20kg) jumps off of the sled and travels 30 degrees north of east. The sled (with a mass of 5kg or Ms=5 kg) is now headed due south. What is the velocity of the dog ( Vd=?), and the sled (Vs=?) right after the dog jumps off of the sled?
A piece of copper wire is formed into a single circular loop of radius 9 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.50 T in a time of 0.45 s.
The coefficient of kinetic friction between a refrigerator (mass 100kg) and the floor is 0.20, and the coefficient of static friction is 0.25. If you apply the minimum force needed to get the refrigerator to move, what will the acceleration be?
question1a uniform meter stick with a mass of 250g is maintained horizontally by two vertical strings one at 0.0-cm
A playground merry-go-round has a radius of 4.20m and a moment of Inertia 240 kgm^2 and turns with negligible friction about a vertical axis through its center. What is the average power supplied by the child
A four-turn circular wire coil of radius 0.565 m lies in a plane perpendicular to a uniform magnetic field of magnitude 0.340 T. what is the average induced emf in the wire during this time
A sealed glass bottle at 27°C contains air at atmospheric pressure and has a volume of 30 mL. It is then tossed into an open fire. When the temperature of the air in the bottle reaches 200°C,
three liquids are at temperatures of 10 degrees c 20 degree c and 30 degrees c respectively. equal masses of the first
On a clear day at a certain location, a 100 V/m vertical electric field exists near the Earth's surface. Compute the energy density of the electric field
You're riding a Ferris wheel while sitting on a scale. A Ferris wheel with radius 9.6m has period 34s. The scale reading for a 80kg person at the BOTTOM of the Ferris wheel, assuming a constant rotation rate, is F = 810N. Find the scale reading for a..
You buy a plastic dart gun, and being a clever physics student youdecide to do a quick calculation to find its maximum horizontal range. What is the maximum horizontal range of your gun
A wheel spinning at 25 rev/s is slowed to a stop by a constant acceleration while turning 50rev. What is the magnitude of the constant acceleration
A π+ meson of rest mass 139.6 MeV collides with a neutron (rest mass 939.6 MeV)stationary in the laboratory system to produce a K+ meson (rest mass 494 MeV)and a hyperon (rest mass 1115 MeV). What is the threshold energy for this reaction in the labo..
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