Hi all. I am marking GCSE paper that I did myself. There is 1 problem that I do not seems to understand. Please help me. Thank you very much. 1. The problem statement, all variables and given/known data Daniel pulls a 3kg box up a slope from rest as shown (Attached) Given that the average friction of a slope is 2N and the speed at which the box reaches the top is 4m/s. What is the average form ce exerted by Daniel to pull up the box from bottom to top? 3. The attempt at a solution I am stuck at this part because the question does not indicate the time taken nor the acceleration. I am not able to use F=MA to find. I only have the acceleration acting on the box due to gravity is approximately 10m/s2. I am not able to use the speed to my advantage in this question. Weight = m x g = 3 x 10 = 30 N I am not sure what is my next step. Hope someone can help me. Thank you!