A mass of 200 g hangs on a light string of length 80 cm. If the mass is displaced horizontally by a distance of 20 cm and then released, calculate
(a) the frequency of the resulting oscillations. (You may take g=10 Nkg−1 .)
(b) the number of oscillations that there will be in 1 minute.
(c) the maximum speed of the mass.
(d) the total energy of the mass during its oscillations.