Rotational Motion Lesson

4 Slides • 3 Questions

1

Rotational Motion

Inquiry Lab

2

Angular position

angle that an object makes with a reference line
here we use radians
$1\ rad=\ \frac{360}{2\pi}=57.3$
arc length (rotational displacement) $s=r\theta$

3

Multiple Choice

What is 2 radians in degrees?

1

57.3

2

114.6

3

26.65

4

angular displacement

$\Delta\theta=\theta_{f_{ }}-\theta_i$
these are in radians

5

Multiple Choice

What is the angular displacement in radians if a paint spot on a tire turns from 57.3 degrees to 282 degrees

1

339.3

2

5.9

3

3.9

4

4.9

6

average angular velocity

$\omega_{av}=\frac{\Delta\theta}{\Delta t}$

7

Multiple Choice

What is the average angular velocity in radians if a paint spot on a tire turns from 57.3 degrees to 282 degrees in .5 sec

1

339.3

2

7.8

3

1.95

4

4.9

Rotational Motion

Inquiry Lab

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