I Jason works for a mov- ing company. A 45 kg wooden crate is sitting on the wooden ramp his truck; the ramp is angled at 11. What is the magnitude of the force, directed parallel to the ramp, that he needs to exert 20 FIGURE P5.77 of on the crate to get it to start mving a. Up the ramp? b. Down the ramp? 3.0 kg 5.0 kg 20 FIGURE P5.77 2.