The motor driving a grinding wheel with a rotational inertia of 0.36 kg m2 is switched o? when the wheel has a rotational speed of 25 rad/s. after 6.6 s, the wheel has slowed down to 20 rad/s. what is the absolute value of the constant torque exerted by friction to slow the wheel down? answer in units of nm.

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

However, had it been a real sound, the sound's pitch would have been increased by the doppler effect, since the falcon was moving the source of the sound. perpendicular to away from towards at the same speed as