A grinding wheel is spinning at a rate of 20.0 revolutions per second. When the power tothe grinder is turned off, the grinding wheel slows with constant angular acceleration andtakes 80.0 s to come to a rest.(a) What was the angular acceleration of the grinding wheel as it came to rest?(b) How many rotations did the wheel make during the time it was coming to rest?

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue