Choose the force diagram that best represents a ball thrown upward by Peter, at the top of its path.

Diagram A
Diagram B
Diagram C
Diagram D

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation