1. The problem statement, all variables and given/known data Well for a lab we did, there's a 3kg mass hanging over a pulley, attached to a 5.4kg brick by a rope, causing the brick to accelerate over a horizontal surface. I have no idea how I'm supposed to calculate the tension. Oh, and the force of friction is 12.01 N. 2. Relevant equations F=ma? 3. The attempt at a solution I don't even know where to begin. Thank you!