Rock Climbing

1
Rock Climbing
2
Rock Climbing

• There are two parts to this unit
• Addition and subtraction of force vectors.
• Tension and extension of materials.

3
Forces

• Forces are vectors because they have both force
  and direction.
• In order for an object to remain at rest, all
  forces must be balanced, the object is in
  equilibrium it has no resultant force acting on
  it.
• In climbing, there are normally several different
  forces acting on a climber, all working in
  different directions. The climber must balance
  these forces perfectly to remain on the rock.

4
Adding forces

• Forces can be added together mathematically or by
  using diagrams.
• Mathematically, we would write R d1 d2 where
  R is the resultant and d1 dn are the component
  forces.
• Because both direction and magnitude are
  involved, diagrams are a much easier way to
  Understand the forces involved.

5
Vector Diagrams

• To use diagrams, we draw each force arrow with a
  length proportional to the size of the force.
• We can then draw the force arrows joined
  together, head to tail, and measure the direction
  and magnitude of the resultant. These diagrams
  are called Vector Polygons