Q. A car drives straight off the edge of the cliff that is 56 m high. The police at the scene of the accident note that the point of impact is 128m from the base of the cliff. How fast was car travelling when it went over the cliff?
Q. A particular guitar string is supposed to vibrate at 192Hz, but it is measured to actually vibrate at 212 Hz. By what percent must tension in the string be changed to get frequency to the correct value?