a 4kg mass swings on a pendulum with a maximum vertical displacement above the equilibrium position of 35cm.

0.20 A 4.0 kg mass swings on a pendulum with maximum vertical displacement above the equilibrium position of 35.0 cm. a. How fast is the mass moving when it passes through equilibrium? b. How fast is the mass moving when it is 17.5 cm above equilibrium? C. When the speed of the mass is 0.75 -, how high is it above the equilibrium position