Good Morning / Afternoon, I'm looking at a question which has been given to me and I'm trying to find out what the answer / formula would be to it. The question is as follows: A student has been asked to move a box of mass 15 kg onto a shelf that is at a height 2 m above the ground level and 10.85 m from where the box was originally kept. The student is moving with the box at a steady speed of 0.123 m/s. As the student approaches the shelf, he notices another student is opening the door adjacent to the shelf area. i. If the student is able to apply sufficient force to stop in 1.2 s, will the student avoid a collision if the opening door is 0.8 m ahead of the box? (We Assume that the student is applying the same magnitude of force throughout that time. I'm new to physics, I've emailed my tutor however I'm yet to have a response and this is slowly eating my brain. Would someone be kind enough to: Help me with the answer / formula Give me a small / brief explanation on how they found that answer / formula (it would help me greatly) As always when I use an online forum any help would be highly appreciated. Thanks.