4:10:03 remaining Question 21 (11 points) A force of 180 N is applied tangential to a 0.280-m-radius grindstone that is known to have a moment of inertia of 3.00 kg-m2. What angular distance (in radians) has the grindstone rotated through after 2.75 s? Your Answer: Answer units Question 22 (11 points) A 14,000-kg bus is moving at 60.0 m/s. Calculate the work needed to slow the bus to a speed of 10.0 m/s. Your Answer: Answer units Question 23 (11 points) A large 2.50-g bug moving with a speed of 14.0 m/s flies directly into the open mouth of a 30.0-g frog. Before this meal, the frog was floating motionless on the surface of a still pond. What is his speed after lunch