4.7

Question 1

What is tension

Answer 1

The pulling force exerted by a string, cable, or chain on an object

Question 2

What is a triangle of forces

Answer 2

Three forces acting at a point in equilibrium, represented by the sides of a triangle

Question 3

How are triangle of forces drawn

Answer 3

• Arrows are drawn to represent each of the 3 forces head to tail
• Triangle is closed because net force is zero and object is in equilibrium

Question 4

How can you interpret the equilibrium of an object

Answer 4

• Resultant of forces horizontally and diagonally must be equal in magnitude to the third force vertically but in the opposite direction
• Resultant force vertically must be 0 and resultant force horizontally must be 0. Therefore diagonal force can be resolved into vertical and horizontal components
• xcos° = horizontal
• xcos° = vertical

Question 5

What are coplanar forces

Answer 5

Forces that lie in the same plane