A homeowner is trying to move a stubborn rock from his yard. By using a a metal rod as a lever arm and a fulcrum (or pivot point) the homeowner will have a better chance of moving the rock. The homeowner places the fulcrum a distance d = 0.288 m from the rock, which has a mass of 345 kg, and fits one end of the rod under the rock's center of weight. Assume that the rod is massless and nearly horizontal so that the weight of the rock and homeowner's force are both essentially vertical. The acceleration due to gravity is g = 9.81 m/s². If the homeowner can apply a maximum force of 615 N at the other end of the rod, what is the minimum total length L of the rod required to move the rock? L = m

mechanics

Rotational Motion Q1: please answer each part and explain each step and reasoning

Rotational Motion Q4: please answer each part and explain each step and reasoning

In sports that involve swinging a bat/racket/club/…, it is important to follow through as high velocity often leads to greater success. Explain the TWO variables that directly determine how fast the ball will move in terms of what you learned in this unit.

It is possible to project an body with a given speed in two possible ways so that it has a same horizontal range. The product of time taken by it in tow possible ways is R 9 2R a. b. C. d. 9 3R 9 4R 9