Question 4 The solution to a spring mass system is given by u = 3.16 cos 2t + 19.18 sin 2t. What is the phase shift? Write your answer in two decimal places.

8.1

Which of ₁ and 2 experiences a/2 phase shift? Air Water Air n = 1.00 n = 1.33 n = 1.00 r₂ r₁ Select one: a. b. c. d. Check r₂ only Neither r₁ or r2 ₁ and 2 ₁ only

question 23 in the image

Chapter 15, Problem 072 A uniform circular disk whose radius R is 14.7 cm is suspended as a physical pendulum from a point on its rim. (a) What is its period? (b) At what radial distance r < R is there a pivot point that gives the same period? (a) Number Units (b) Number Units Click if you would like to Show Work for this question: Open Show Work

4. After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 49.0 cm . The explorer finds that the pendulum completes 90.0 full swing cycles in a time of 145s. What is the magnitude of the gravitational acceleration on this planet?

Three children are riding on the edge of a merry-go-round that is a disk of mass 98 kg, radius 1.9 m, and is spinning at 25rpm. The children have masses of 24 kg, 26 kg, and 32.6 kg.Randomized VariablesM = 98 kgm1 = 24 kgm2 = 26 kgm3 = 32.6 kgr = 1.9 mf = 25 rpm If the child who has a mass of 26 kg moves to the center of the merry-go-round, what is the new magnitude of angular velocity in rpm? f' =

A pendulum makes 21 oscillations in exactly 50 ss.     Part A What is its period?   B What is its frequency?

Letters A-D if possible