Author Question: A machinist turns on the power to a grinding wheel at time t = 0 s. The wheel accelerates uniformly ... (Read 67 times)

azncindy619 · **on:** Jul 29, 2018

A machinist turns on the power to a grinding wheel at time t = 0 s. The wheel accelerates uniformly from rest for 10 s and reaches the operating angular speed of The wheel is run at that angular speed for 30 s and then power is shut off.

The wheel slows down uniformly at 2.1 rad/s2 until the wheel stops. In this situation, what is the angular acceleration of the wheel between t = 0 and t = 10s? A) 3.8 rad/
B) 4.6 rad/
C) 5.3 rad/
D) 6.1 rad/
E) 6.8 rad/

Question 2

Physically, the type of energy represented by the water behind a dam is

A) kinetic.
B) thermal.
C) chemical.
D) electromagnetic.
E) gravitational.