# Lab assignment, physics homework help

*label*Science

*timer*Asked: Apr 14th, 2017

*account_balance_wallet*$20

**Question description**

I want some one to do for me a lap assignment. The INFO and the instructions in the files that I posted.

#Make sure to follow the instructions because my doctor will grade it.

## Tutor Answer

===================================================Please find the attachment

Theory

DEF: A vector is a quantity that has both magnitude and direction.

DEF: A scalar is a quantity that has magnitude but NO direction.

Ex.

Vectors

Force

Velocity

Displacement

Acceleration

Ex.

Scalars

Temperature

Time

Mass

Speed

Vector Notation A –

Boldface letters

- Arrow above letter

– Magnitude of vector A

A vector is defined graphically by an arrow whose length is proportional to the magnitude of the vector

quantity. The direction of the arrow points in the direction of the vector quantity.

Adding Vectors Graphically

Consider adding two vectors A and B graphically. The two vectors are shown below.

1. Select an appropriate scale. (Ex. 20 cm = 5 N)

2. Draw vector A to scale and in the proper direction.

3. Draw vector B to the same scale with its tail at the tip of A and in the proper direction.

4. The resultant vector R = A + B is the vector drawn from the tail of vector A to the tip of vector B.

5. Calculate the magnitude of the resultant vector R using the selected scale and measure its direction with

a protractor.

6. This same process applies if you add more than two vectors.

This method of adding vectors graphically is also referred to as the

i.

head-to-tail method, ii.

analytical method, and

iii.

geometric method.

Adding Vectors Using Component Method

Consider adding three 2-D vectors A, B, and C:

A = Axx+ Ayy

B = Bxx + Byy

C = Cxx + Cyy

1. Add the x-components and y-components of each vector to obtain the resultant vector R in unit vector

notation.

R = A + B + C = (Axx+ Ayy) + (Bxx + Byy) + (Cxx + Cyy)

R = (Ax + Bx + Cx) x + (Ay + By + Cy) y

Rx = Ax + Bx + Cx

Ry = Ay + By + Cy

R = Rx x + Ry y

2. Calculate the magnitude of the resultant vector R

4.

Same procedure applies if you add more than 3 vectors. However, if the vectors are 3D,

then you must specify the direction of the resultant vector R relative to the positive x, y,

and z axis.

Equipment

1. protractor

2. ruler

3. pencil

4. paper

Procedure

Exercise 1

1. A car travels 20 mi at 600 north of west, then 35 mi at 45o north of east.

2. Express each displacement vector in unit vector notation. Take the +x-axis due east and the

+y-axis due north.

3. Use the component method to obtain the resultant displacement vector in unit...

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