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 The wheel is run at that angular velocity for 30 s and then power is shut off. The wheel slows down uniformly at until the wheel stops. In this situation, the average angular velocity in the time interval from to is closest to:

atomic = no of protons.

mass number-atomic number = neutron number

v 154.9= 0.9 length length s little over 154.9cm

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )