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A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.55 kg to a friend standing in front of him. The student and the skateboard have a combined mass of mc = 127 kg and the book leaves his hand at a velocity of 3.6 m/s at an angle of 33° with respect to the horizontal. Part (a) Write an expression for the magnitude of the velocity of the student, vs, after throwing the book. Part (b) Solve for the magnitude of the velocity of the student, vs in m/s?
A projectile proton with a speed of 350 m/s collides elastically with a target proton initially at rest. What is the speed of the projectile proton after the collision
When venturing forth on Planet X, you throw a 5.01 kg rock upward at 11.0 m/s, What does the rock weigh on Planet X
A copper wire and an aluminum wire of the same length have the same resistance. What is the ratio of the diameter of the copper wire to that of the aluminum wire
A small asteroid is discovered in a circular orbit around a larger asteroid at a distance of 19.39 km. The period of the orbit is measured to be 76.76 hours. What is the mass of the larger asteroid
The helium-neon laser you have used in this lab produces photons with an wavelength of 632.8 nm at a power of 3 milliwatts. How many photons are emitted from the laser every second
What is the least radius of the circular path? (b) At this radius, what is the force causing the centripetal acceleration of the pilot.
A 76-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 817 N. What is the acceleration of the elevator in m/s^2 upward
a generator uses a coil that has 116 turns and a 0.455 t magnetic field. the frequency of this generator is 70.0 hz and
There are four charges, each with a magnitude of 2.0 µC. Two are positive and two arenegative. The charges are fixed to the corners of a 0.33 m square, one to a corner, in such a way that the net force on any charge is directed toward the center o..
A generator has a square coil consisting of 265 turns. The coil rotates at 106 rad/s in a 0.174-T magnetic field. What is the length of one side of the coil
a thin rod of length 10.3m and mass 20kg is supported at a 30 degree incline. one support is 2.4m and the other is 8.3m from the lower end of the rod, Find the normal force exerted on the rod by the upper support answer in units of N
The wheels of an automobile are locked as it slides to a stop from an initial speed of 30.0 m/s, approximately how long does it take the car to stop
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