Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 58 rad/s. the wheel is run at that angular velocity for 30 s and then power is shut off. the wheel slows down uniformly at 1.4 rad/s2 until the wheel stops. in this situation, the total number of revolutions made by the wheel is closest to:

The total number of revolutions made by the wheel is closest to is 28.2 revolutions. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

Ф=1716.8 Rev

Explanation:

A machinist turns the power on to a grinding wheel, at rest, at time t = 0 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 58 rad/s. The wheel is run at that angular velocity for 30 s and then power is shut off. The wheel slows down uniformly at 1.4 rad/s2 until the wheel stops. In this situation, the total number of revolutions made by the wheel is closest to:

the time it takes to stop revolution will be found using this using this equation

ω2=final angular velocity

ω1=initial angular velocity

∝=angular deceleration

t=time

ω2=ω1+∝t

0=58 rad/s-1.4 rad/s^2t

t=58/1.4

t=39.28secs

to get the total number of revolution made by the wheel ,we get the area under the graph, which is a trapezium

Ф=1/2(20+39.2)*58

Ф=1716.8 Rev

are you like autistic or something?

xd

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.