Question

An engineer is testing a large wind turbine that is used generating energy. Intially the large wind blades are locked in place and not rotating. In a steady wind, a t=0st=0s the engineer releases the blades and they begin to rotate. The engineer notes from the instruments that at t=15st=15s one of the blades made one-half of a rotation. What is the angular acceleration of the blades, assuming the acceleration is constant?

0.056rad/s20.056rad/s2

0.14rad/s20.14rad/s2

0.028rad/s2

Answer #1

Initial angular speed of the blades = = 0 rad/s

Time taken by the blades to make one-half of a rotation = T = 15 sec

Number of rotations made by the blade = n = 0.5 rev

Angle through which the blade has rotated =

= 3.1416 rad

Angular acceleration of the blades =

= 0.028 rad/s^{2}

**Angular acceleration of the blades = 0.028
rad/s ^{2}**

The blades on modern wind turbines are typically 20 to 40 meters
in length. Two different turbines have their blades attached with
one end at the center of rotation. Consider two points, each at the
outer end of a blade on each of the turbines: one with a blade
length of 20.6 m, and the other with a blade length of 38.4 m. Each
blade is rotating with a constant angular speed of 3.73 rad/s, and
the rotation is considered...

Case Abstract: Company ABC, an AE, constructor and
construction management firm, recently assigned Bob Ironside to
turn a major coal fired generating station project around.
Currently at 36 percent construction completion, the project is
shifting from an emphasis on civil and structural work to bulk
production. Cooperation of the owner, the multi-prime contractors,
and strong labor unions is cach vital for performance improvement.
The analysis of this project involves: 1) identification of
significant external influences on the project organization, 2)...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 29 minutes ago

asked 31 minutes ago

asked 37 minutes ago

asked 39 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago