Khan Academy Static

4A: Let’s picture an adventurous rock-climber hanging at the edge of a cliff. Gravity is providing a downward force. The only reason he does not fall down to the valley below is due to the force of tension upward, provided by the muscles of his arm. You will work through some interesting real-world problems involving tensile forces in these tutorials.

15145_Introduction_to_tension.html

15147_Tension_in_an_accelerating_system_and_pie_in_the_face.html

15146_Introduction_to_tension_part_2_.html