Q1. A violin string that is 45.5 cm long has a fundamental frequency of 490 Hz.
what is the speed of the waves on this string?
Q2. A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 2.0 cm and released. If the spring constant is 85 N/m, what is the magnitude of spring force acting on the toy at the moment it is free?