At each corner of a square of side there are point charges of magnitude Q, 2Q, 3Q, and 4Qa)Determine the magnitude of the force on the charge 2Q. Express your answer in terms of Coulomb's constant k, Q, and l. Express your answer using two significant figuresb)Determine the direction of the force on the charge 2Q Express your answer using two significant figures

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .