A 10-pound weight is lying on a sit-up bench at the gym. If the bench is inclined at an angle of 13 degrees, there are three forces acting on the weight. N is called the normal force and it acts in the direction perpendicular to the bench. F is the force due to friction that holds the weight on the bench. If the weight does not move, then the sum of these three forces is 0. Find the magnitude of N and the magnitude of F.
I foung that the magnitude of F=2.2 lb. How do I find the magnitude of N?
Also, Mark pulls Allison and Mattie in a wagon by exerting a force of 30 pounds on the handle at an angle of 21 degrees with the horizontal. How much work is done by Mark in pulling the wagon 220 feet?
Is this correct? If not how do I do this?
(30cos21)(220)=6161 ft/lb
I foung that the magnitude of F=2.2 lb. How do I find the magnitude of N?
Also, Mark pulls Allison and Mattie in a wagon by exerting a force of 30 pounds on the handle at an angle of 21 degrees with the horizontal. How much work is done by Mark in pulling the wagon 220 feet?
Is this correct? If not how do I do this?
(30cos21)(220)=6161 ft/lb