Question

1) An object feels the impact of 3 forces. The mass of the object is 2.82 kg. The object has an acceleration of 1.93 m/s² at 28.6 degrees N of E. Force 1 is 11.0 N at 62.4 degrees S of E and Force 2 is 18.8 N at 57.5 degrees S of W. What is the magnitude and direction of Force 3? (Assume that no additional forces act on the object.)Do not use energy ideas in your solution.

2) A series of boxes is pushed by a horizontal force across a frictionless surface as shown in the diagram below. Box A has a mass of 9.57 kg, Box B has a mass of 12.3 kg, and Box C has a mass of 6.20 kg. The boxes are moving to the right and speeding up with an acceleration of 0.343 m/s². If air resistance is ignored, there are 11 total forces acting on the 3 boxes.
Do not use energy ideas in your solution.

1. Draw separate free body diagrams for each box. Each force should be clearly labeled.
2. Determine the magnitude of all 11 forces involved.
3. What is the magnitude of the largest force?
4. What is the magnitude of the smallest force?
5. If you have not done so already, indicate how Newton's Third Law is involved in your solution3

Answer 1

= 2-8241-93103628411 + Bir(1305) (3) FR = 4.771 +2.60 fr F = 4( cosec2-4) 1– Sin( 62.-4)) 5.09 3(- cos (575) Sin(57.5) 51) 9.75 ) - 18.8 -10.4 15.86 Now F + k + E FR 5.091- 9.751 - 1048-15.866 1011 –15.869 +, F = 4.771 +2.69 Lim 9.781 + 28-21 da tanto 28:21 70-87 9.78 North of east 27 Figure missing