An electric motor can drive grinding wheel at two different speeds. when set to high the angular speed is 2000 rpm. the wheel turns at 1000 rpm when set to low. when the switch is changed from high to low, it takes the wheel 60 sec to slow down. a) ( 5 points) what is the initial angular speed of the high setting in rad/sec b) (5 points) what is the angular acceleration in rad/s2 of the wheel? c) (5 points) what is the angular speed in rad/s 40 seconds after the setting is changed? d) (5 points) how many revolutions did it make as it changes speed?

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

The solid that is formed and usually sinks to the bottom of a solution is the

Write a polynomial function with the given zeros x= -1,0,2show your work