Newton’s First Law (Balanced Forces) Examples

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Presentation transcript:

Newton’s First Law (Balanced Forces) Examples Modified Atwood’s Machine A Constant Velocity B Method 1 Treat as two separate objects tied together by a string. A B

Newton’s First Law (Balanced Forces) Examples Example 3 continued Modified Atwood’s Machine A Constant Velocity B Method 1 Begin by writing an equation for the horizontal forces acting on Box A. A B

Newton’s First Law (Balanced Forces) Examples Example 3 continued Modified Atwood’s Machine A Constant Velocity B Write an equation for the vertical forces acting on Box B. Method 1 A B

Newton’s First Law (Balanced Forces) Examples Example 3 continued Modified Atwood’s Machine A Constant Velocity B Method 2 Treat as a single system since all of the parts move together. Write an equation for the horizontal forces acting on the system. A B The Force of Tension is inside the system and can therefore be ignored.