Q1. The magnitude of the gravitational force between two Sumo wrestlers just before they collide (r = 0.025 m) is 2.77 × 10^-3 N. If one wrestler has a mass of 177 kg, what is the mass of the other wrestler?

Q2. A pipe open at one end only has a fundamental frequency of 242 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Now, as both pipes vibrate at their fundamental frequencies, the beat frequency of 17 Hz is heard. How many centimeters were cut off the end of the second pipe? The speed of sound is 333 m/s.