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A.) Calculate the launch speed of a projectile that rises vertically above the earth to an altitude equal to one earth radius before momentarily coming to rest. Beware you cannot use the old expression of PE = mgh.
B.) What will be the minimum lanch speed so that it takes the projectile to infinity (escape speed)?
Blocks A, B, and C are placed as in the diagram below and connected by ropes of negligible mass. What is the weight of block
In a photoelectric-effect experiment, the wavelength of light shining on an aluminum cathode is decreased from 249nm to 207nm. What is the change in the stopping potential
The starship Enterprise speeds by you at a speed of 0.960c. It is measure in your frame to be 100 m long. What will be it's length at rest
Manufacturers of wire (and other objects of small dimensions) sometimes use a laser to continually monitor the thickness of the product. The wire intercepts the laser beam, producing a diffraction pattern like that of a single slit of the same wid..
a star of mass 2.0 1031 kg that is 4.4 1020 m from the center of a galaxy revolves around that center once every 1.8 x
express the image distance si of a convex mirror in terms of the object distance so and the radius of curvature of the
suppose that the coefficient of friction between your feet and the floor while wearing socks is 0.250. knowing this you
Two identical uniform poles of mass 50 kg and linear mass density 15 kg/m are supported by pivots 2 m apart on level ground. what angle do the poles make with the vertical
What fraction of the original kinetic energy of puck dissipates during the collision, kinetic friction before is 40 m/s, kinetic friction after is 29.3 m/s
A mass of 180g is held by a horizontal spring of constant 22 N/m. It is displaced from its equilibrium position and released from rest. What is the magnitude of initial displacement
A plane is pointed in the positive x direction and is flying with an speed of (200, 0, 0) m/s relative to the air. Find the velocity of the plane with respect to the ground
Suppose you walk 18 m straight East and then 26.5 m straight South. How far are you from your starting point in meters
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