# Act_5 - Name Section 5.1 What Are the Four Fundamental Forces a Period 5 Activity Sheet Forces and Newtons Laws Based on your class activities and

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17 Name ________________________ Section ___________________ Period 5 Activity Sheet: Forces and Newton’s Laws 5.1 What Are the Four Fundamental Forces? a) Based on your class activities and your instructor’s explanation, give examples of each of the fundamental forces. 1) Gravitational Force 2) Electromagnetic Force 3) Strong Nuclear Force 4) Weak Nuclear Force b) The space between an atomic nucleus and its electron cloud is so great that the majority of the volume of an atom is empty space. Since atoms are mostly empty space, explain in terms of fundamental forces why a solid object sitting on a table does not fall through the table. c) Group Discussion Question: Since all objects contain positive and negative electrical charges, shouldn’t we feel an electromagnetic force from every object we encounter? Explain why we do not. 5.2 How Do Newton’s Laws of Motion Describe Forces? a) Newton’s First Law: Your instructor will demonstrate a metal cart on an air track, which minimizes the amount of friction between the cart and the metal track. 1) As the cart moves along the track, is there a net force acting on the cart? _________ 2) Is a net force required to keep the cart moving at a constant speed? ______ Explain why or why not.

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18 g M D M M G F rock planet rock = = 2 b) Newton’s Second Law : F = M a A Lamborghini Diablo sports car can accelerate from 0 MPH to 60 MPH in 4.3 seconds. The mass of the car is 1,580 kg. Calculate the force (in newtons) needed to accelerate the car. (We assume that its acceleration is constant.) 1) Convert 60 miles/hour into meters/second. Hint: 1 mile = 1,609 meters. ________ 2)
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## This note was uploaded on 06/11/2011 for the course PHYSICS 103 taught by Professor Staff during the Spring '10 term at Ohio State.

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Act_5 - Name Section 5.1 What Are the Four Fundamental Forces a Period 5 Activity Sheet Forces and Newtons Laws Based on your class activities and

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