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12) A 1.8x10's kg test charge (3.2x105 C) is placed (so starting from rest) in a uniform electric field with an intensity of 8,000 N/C. What will the test object's velocity be after 2 seconds? 28,444 m/s 13) A block, with a charge of 4x10*C, is initially traveling at 8m/s (on a horizontal surface) when it encounters a uniform electric field and a surface with friction (So both are stopping the block). The coefficient of kinetic friction between the block and the surface is u=0.2. The magnitude of the electric field is 1500 N/C. If the block is brought to a stop in 0.2 s, what is the mass of the block? 0.000158 kg 14) A 2kg mass is released from rest in an electric field with a strength of 2,46IN/C that points up. The 2kg mass has a charge of 8mC. What is the charge's velocity after traveling up a vertical distance of 6m? 0.727m/s #15 below is basically the same problem twice. Once with a proton, once with an electron. It wouldn't make sense to do this on a test if the test is assessing your ability to a projectile problem in an electric field. Still, it's good practice. It & O bree imp n Ohm. sover this relationch wu to commemorate his con