What force (in newtons) is required to accelerate a body with a mass of 32 kilograms at a rate of 12 m/s2?

Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.