Derivation of mathematical formula for angular frequency of simple pendulum. complete derivation

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c