Rubber on concrete has a static friction co-efficient of 1.86. A 1.9 kg rubber block is pushed from rest along concrete. What is the minimum force (N) that the ball must be pushed with for it to begin accelerating (correct to 2 decimal places)? Write your answer using TWO decimal places. Do NOT include units. You must include a leading zero in your answer if appropriate (e.g., 0.18)