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l. IJ '11 '3 .' . . _ An 88.-Ltlogram block rests on an inclined plane. A string that 1735565 0\\'U a pulley connects this block to another block \\vhose mass '5 88-3 K3- The pulley has a mass of5.24 kg and a radius of 0.195 m. The coefcient of kinetic friction between the block and the Plane is 0.325. (a) Draw and label a free-body diagram of all the forces acting on each block. (bl Find the acceleration of the blocks. A 5.75-1tg steel ball has an initial velocity of 6.34 30 meters per second. The ball collides with and imbeds itself in a 3.85kg block ofclay traveling at 2.501140 meters per second. (:1) Calculate the initial momentum of each object and write the re- sult tn rectangular form. (bl Calculate the momentum of the combined mass after collision and write the result in polar form. (c) Calculate the final velocity after collision and write the result in polar form. Part of a light ray striking an interface between air and water is refracted. and part is reected. as shown. The index of refraction of air is 1.00 and the index of refraction of water is 1.33. The frequency of the light ra_v is 7.85 X 1016 Hz. tat IfB, measures 40:. nd the value of 93. (b) 11'91 measures 40'. nd the value of63. (c) Calculate the speed of the light ray in the water. (d1 Calculate the wavelength of the light ray in the water. (C) What is the largest value ofl that will result in a refracted ray? Four resistors are arranged in a circuit. as shown. There is a consrant voltage 1' across the voltage source. The current I is 0.25 ampere. (2) Find the equivalent resistance of the four resistors. (b) Find the voltage 1" across the voltage source. (c) Find the voltage across resistor R3. (d) Find the power dissipated by resistor R3. Two long parallel wires 0.552 meter apart are each carrying 1.75 amperes of current. as shown. (a) Find the magnitude and direction of the magnetic eld at point A due to the current in the top Wire. (13) Find the magnitude and direction of the force per unit length this eld exerts on the bottom wire. .._.._- 140