Question

Q1. A set of ocean waves travelling towards the shore can be represented by the following equation. ?(?,?)=?????(??−?.??)
a) What is the amplitude of the waves?

b) What is the wavelength of the waves?

c) What is the period of the waves?

d) What is the wave speed?

Q2. In another experiment, A force of F = 3i+2k N is applied to the edge of a thin metal disk, with mass 20kg and radius 1.4 m. The point on the object where the force is applied is described by the displacement vector r = 3i+4j m
a) Make a sketch of the experiment including the position of the disk on a graph and the position and direction of the applied force. (2pts)

b) What is the magnitude of the applied force?

c) what is the angle of the displacement vector with respect to the x-axis

d) What is the moment of inertia of the disc, if it rotates about its center of mass axis?


Q3. An ice dancer decides to perform a spin on the ice. After beginning the spin and making the first full rotation, he pulls his arms in close to his body. Describe what happens next and why?

Answer 1