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A 325-g model boat floats on a pond. The wind on its sail provides a force of 1.5 N that points 15° north of east. The drag force of the water on the boat is 0.78 N, toward the west. If the boat starts from rest and heads east for a distance of 3.4 m, how fast is it moving?
When a certain spring is stretched by an amount x, it produces a restoring force of F(x) = ax=bx^2, where a and b are constants. How much work is done through an external force in stretching the spring by an amount D from its equilibrium length.
A uniform 8.25m , 1750 kg beam is hinged to a wall and supported by a thin cable attached 2.00m from the free end of the beam, How hard does the beam push inward on the wall
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. What is the power of one laser pulse
The magnitude of a force vector is 80.4 newtons (N). The x component of this vector is directed along the +x axis and has a magnitude of 72.6 N.
find the energy in joules of the photons.
a 0.340-m-long cylindrical capacitor consists of a solid conducting core with a radius of 1.00 mm and an outer hollow
A 23.0-yr-old astronaut named Ashlin travels at speed .800c to a star 33.2 ly from Earth. Find the distance between Earth and the star in the astronaut's frame of reference
THe magnetic dipole moment of Earth has a magnitude 8*10^22 J/T. Assume that this is produced by charges flowing in Earth's molten outer core, what is the current that the charges produce
Consider a conical pendulum with a bob of mass m = 68.0 kg on a string of length L = 10.0 m that makes an angle of ? = 7.00° with the vertical. Determine the radial acceleration of the bob
q1. a vaulter holds a 31.67-n pole in equilibrium by exerting an upward force u with her leading hand and a downward
at 20 deg c an alum ring has an inner diameter of 5.000 cm and a brass rod has a diameter of 5.050 cm. a if only the
A car with the initial speed of 11.5 mi/h uniformly accelerates at a rate of 0.2 m/sec^2 while it travels 13.4 m. How much time has elapsed
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