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7.1 Vectors as Forces Part One

# 7.1 Vectors as Forces Part One - 7..notebook...

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7.1 Vectors as Forces Part One.notebook 1 September 23, 2009 A force is something that pushes or pulls an object. On Earth, force is defined as the product between the mass of an object and the acceleration due to gravity (9.8 m/s 2 ). A 1 kg mass exerts a downward force of 1 kg x 9.8 m/s 2 , or 9.8 kg m/s 2 , or 9.8 N ( 1 N = 1 kg m/s 2 ) Chapter 7: Application of Vectors 7.1 Vectors as Forces (Part One) When we are trying to determine the direction that an object moves (or if it moves at all!) we must know both the magnitude and direction of the forces acting on it... therefore it makes sense to use vectors to describe forces. Recall: F = ma, (where F = force, m = mass in kg, and a = acceleration) When using vectors to represent a situation involving forces, there are two different representations we can use: Position Diagram vs. Vector Diagram eg#1. Mason pulls on a rope with a force of 70 N at 30 o to the ground. Jennie pulls horizontally with a force of 45 N.

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