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a tennis ball of mass 0.060 kg is served. It strikes the ground with a velocity of 54m/s ( 120 mi/h) at an angle of 22 degree below the horizontal. Just after the bounce it is moving at 53 m/s at an angle of 18 degree above the horizontal. If the interaction with ground lasts 0.065s, what average force did the ground exert on the ball?
A star is moving away from Earth at a speed of 2.4 X 10^8 m/s. find the wavelength as measure by an Earth observer
Two round rods, one steel and the other copper, are joined end to end. Each rod is 0.795m long and 1.85cm in diameter. The combination is subjected to a tensile force with magnitude 3950N.
A rod of 2.0-m length and a square (2.0 mm x 2.0 mm) cross section is made of a material with a resistivity of 6.0 x 10 ^-8 ohms m. What is heat generated in the rod
A tetherball leans against the smooth, frictionless post to which it is attached. what is the force the pole exerts on the ball
Assume that the rod is held at rest horizontally and then released. (Throughout the remainder of this problem, your answer may include the symbol, moment of inertia of the assembly, whether or not you have answered the first part correctly.)
In order better to map the surface features of the Moon, Calculate the satellite's kinetic energy, gravitational potential energy, and total orbital energy
A man of mass 76.5kg walks down the aisle of an airplane at a speed of 1.10 m/s in the forward direction while the plane moves at a speed of 280 m/s relative to the earth
A block of mass M=0.986kg is floating stationary in a beaker of water. A string connected to the bottom of the beaker holds the block in place. find the direction of the buoyant force acting on the block
two semicircular filament have a common diameter. one lies in the x-y plane and one in the x-z plane. the curved portion of each carries a uniform line charge density (rho). find the electric filed at the common cetner of the semicircles
A rifle is aimed horizontally at a target 1,234.37 m away. What is the bullet's time of flight
Find out the magnitude of that push.
A rocket powered sled accelerates uniformly from 12m/s to 115m/s while undergoing a straight line path displacement of 225m. What is the acceleration of the sled
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