# Physics 111: Mechanics Lecture 3

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Phys111 lecture03
1, Календар режа 2 семестр18.02., 1, 1, 1918-1945 yillarda Xitoy, boshqaruv pedagogikasi va etikasi, курс ишини бажариш бўйича услубий кўрсатма, axborot xafsizligi test uzb(1), jamoani shakllantirish uslubiyoti, jamoani shakllantirish uslubiyoti, KT mus ish v-21, 9-mavzu boyicha topshiriq, Olimlar, Гули 207-18, волейбол

## Motion in Two Dimensions

• February 5-8, 2013

## Vector and its components

• February 5-8, 2013
• Or,

## Vector Algebra

• February 5-8, 2013
• Which diagram can represent ?
• A) B)
• C) D)

## Motion in two dimensions

• February 5-8, 2013
• y
• x
• z
• i
• j
• k
• x

## Position and Displacement

• February 5-8, 2013
• In one dimension
• In two dimensions
• Position: the position of an object is described by its position vector --always points to particle from origin.
• Displacement:
• x1 (t1) = - 3.0 m, x2 (t2) = + 1.0 m
• Δx = +1.0 m + 3.0 m = +4.0 m

## Average & Instantaneous Velocity

• February 5-8, 2013
• Average velocity
• Instantaneous velocity
• v is tangent to the path in x-y graph;
• February 5-8, 2013
• A turtle starts at the origin and moves with the speed of v0=10 cm/s in the direction of 25° to the horizontal.
• (a) Find the coordinates of a turtle 10 seconds later.
• (b) How far did the turtle walk in 10 seconds?
• February 5-8, 2013
• Motion of a Turtle
• Notice, you can solve the equations independently for the horizontal (x) and vertical (y) components of motion and then combine them!
• X components:
• Y components:
• Distance from the origin:

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