Newton's 1st Law

Static Equilibrium

Learning Objectives

	Apply Newton's 1st Law (F=ma) to solve for unknown forces.
	Predict and confirm different vertical forces during static equilibrium (Net Forces = 0).

Equipment

Overhead bars, spring scales, assorted masses, suspension bins.

Procedure

Your group will be assigned a mass.

1. Static Equilibrium exists when the Net Forces on an object total zero (cancel each other out). The sum of all vertical Force vectors equal zero, and the sum of all horizontal Force vectors equal zero. Today your assigned mass will have vertical force vectors show in the diagram below. We will consider horizontal forces in another lab.

Print you PHY 111 Vector Data Collection Tool or PHY 112 Vector Data Collection Tool. Continue reading below and complete the Data Tool.

Part I

	Total your assigned hanger and disc masses.
	Convert the grams to kilograms
	Use Newton's Force equation (F=ma) to calculate the Force of gravity.
	Use a 2.5 Newton Spring Scale to check your accuracy. Zero the scale before hanging the masses.

Part II

	Referring to the T & Fg diagram above. Calculate the Tension that is necessary to suspend the mass and prevent it from falling.
	Sum the two vertical vectors.

Part III

First Predict the following Forces.

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