A wagon is pulled with a force of 38.0 Newtons pulled in the direction of the handle at 42 degrees with the horizontal. If the wagon is pulled in a horizontal circle with a radius of 25.0 m, how much work is done by the person pulling the wagon?

Amachinist 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 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to: