Normal Force
Explore concepts of normal force, tension in ropes, connected objects' motion, Atwood machine, and force exerted by braces. Solve problems involving forces and tensions in various scenarios.
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Presentation Transcript
Tension This is the force exerted by a rope or a cable attached to an object. Tension has the following characteristics: 1. It is always directed along the rope. 2. It is always pulling the object. 3. It has the same value along the rope. The following assumptions are made: a. The rope has negligible mass compared to the mass of the object it pulls. b. The rope does not stretch. If a pulley is used, we assume that the pulley is massless and frictionless.
Motion of Connected Objects m1= 10 kg m2= 8 kg a. b. What is the acceleration of the two carts? What is the net force acting on each cart?
Force exerted on tooth by braces 33. What force is exerted on the tooth in Figure 4.38 if the tension in the wire is 25.0 N?
Problem 42 42. A 76.0-kg person is being pulled away from a burning building as shown in Figure 4.41. Calculate the tension in the two ropes if the person is momentarily motionless.
