# Physics & CHemistry – LarryHarris StudyGuide Physics&Chemistry Th This preview shows page 1 – 2 out of 2 pages.

Larry Harris Study Guide Physics & Chemistry Friction is a type of force that acts against motion. Gravity is the force of attraction between two objects due to their masses. The LAW OF UNIVERSAL GRAVITATION states that:  All objects in the universe attract each other with gravitational force.  The amount of gravitational force depends on the mass of the objects.  The amount of gravitational force depends on the distance between two objects. Mathematical equation for the LAW OF UNIVERSAL GRAVITATION : Fg = Gx (m 1 *m 2 / r 2 ) Fg= force of gravity Gx= gravitational constant is always 6.67300*10 -11 m 3 kg -1 s -2 (m 1 / m 2 )= mass of object 1 & 2 R 2 = distance between the center points (radii) of each object Weight is a measure of gravity acting on mass. A vacuum is a place where there is no matter. Newton’s Second Law: F= m a A= F/m =W/m = M g/ m A= g Newton’s first LAW OF MOTION #### You’ve reached the end of your free preview.

Unformatted text preview: deals with cases in which the net force on an object is zero. Inertia is the tendency for objects to resist change in motion. Newton’s first law looks like this: An object at rest remains at rest unless acted on by an unbalanced force. An object in motion remains in motion at a constant speed and in a straight line unless acted on by an unbalanced force. Balanced forces create a net force of zero and no movement. Unbalanced forces lead to movement. When you are sleeping, you are an object at rest. You remain at rest until your body applies a force to overcome gravity and get you out of bed. Newton’s second LAW OF MOTION looks like this: The acceleration of an object depends on its mass & the amount of force applied to it. Acceleration is the rate of change in velocity due to change….
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