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Two forces, of magnitude F1=50.0 N and F2=22.0 N, act in opposite directions ona block which sits atop a horizontal frictionless surface as shown. Initially, the center of the block is at position xi=-4.00 cm. At some later time, the block has moved to the right, and its center is at position xf=+6.00 cm. a) What is the work done by force F2 as the block moves from x=xi to x=xf? b) What is the change in the block's kinetic energy as it moves from x=xi to x=xf?
A converging lens of focal length 19.2 cm is separated by 55.3 cm from a converging lens of focal length 4.72 cm. If the height of the object is 3.10 cm, what is the height of the final image
A balsa-wood raft has the following dimensions: L=2.34m , W= 1.35m , H= 0.65m. if the mass of an average person is 72.5kg, how many people can the raft safely support
A ball launched from ground level lands 2 s later on a level field 30 m away from the launch point. Find the magnitude of the initial velocity vector
A rock is thrown vertically upward from ground level at time t = 0. At t = 1.9 s it passes the top of a tall tower, What is the height of the tower
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 13.9 m/s at an angle of 44.2° above the horizontal. It rises to its maximum height and then falls down to the green...
Two horizontal curves on a bobsled run at the similar angle, but one has twice the radius of the other. The safe speed (no friction needed to stay on the run) for the smaller radius to curve is v. What is the safe speed on the larger radius curve.
A storage tank at STP contains 15.0 kgof nitrogen (N2). What is the volume of the tank
A baseball of mass 145 gram leaves the pitcher´s hand at 96.6 mi/h, but due to air resistance, it arrives at home plate 60.0 feet away traveling at 95.3 mi/h. Obtain how much work is done by friction during the flight of ball
For a wavelength of 420nm, a diffraction grating produces a bright fringe at an angle of26°. What is the unknown wavelength
Find the center of mass of a system composed of three spherical objects with masses of 3.4kg , 2.3kg , and 4.2kg and centers located at (-6.2m , 0), (2.0m , 0), and (2.8m , 0), respectively.
Find out the magnetic induction at a point
A 1.8 m long solenoid is 15 cm in diameterand consists of 2010 turns of wire. The current in the solenoid is increasing at the rate of 1.0 kA/s.
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