4 Physics 6A Newton's Laws Examples

4 Physics 6A Newton's Laws Examples - Newtons Laws Examples...

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Unformatted text preview: Newtons Laws Examples Physics 6A Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Newtons Laws of Motion These three rules govern the motion of any object. 1: Law of Inertia The velocity of an object will not change unless it is acted upon by a nonzero net force. 2: This is the formula we will use to calculate the effect of forces on objects. a m F = 3: Forces always come in action-reaction pairs. You have probably heard this as for every action there is an equal and opposite reaction. Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Example: An eraser sliding on the chalk rail The eraser in the diagram is pushed giving it an initial velocity v , then released and allowed to slide until it stops. We will put some numbers in later. For now, we will consider what Newtons Laws tell us about this motion. v Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Example: An eraser sliding on the chalk rail The eraser in the diagram is pushed giving it an initial velocity v , then released and allowed to slide until it stops. We will put some numbers in later. For now, we will consider what Newtons Laws tell us about this motion. v You may think that Newtons first law (inertia) would tell us that the eraser should continue forward at speed v indefinitely. Does the eraser do this? Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Example: An eraser sliding on the chalk rail The eraser in the diagram is pushed giving it an initial velocity v , then released and allowed to slide until it stops. We will put some numbers in later. For now, we will consider what Newtons Laws tell us about this motion. v You may think that Newtons first law (inertia) would tell us that the eraser should continue forward at speed v indefinitely. Does the eraser do this? No, of course it slows down and then stops. So is Newtons first law violated? Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Example: An eraser sliding on the chalk rail The eraser in the diagram is pushed giving it an initial velocity v , then released and allowed to slide until it stops. We will put some numbers in later. For now, we will consider what Newtons Laws tell us about this motion. v Here it is again does the motion of the eraser follow this rule? 1: Law of Inertia The velocity of an object will not change unless it is acted upon by a nonzero net force. You may think that Newtons first law (inertia) would tell us that the eraser should continue forward at speed v indefinitely....
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4 Physics 6A Newton's Laws Examples - Newtons Laws Examples...

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