Physics 218: Mechanics Instructor: Dr. Tatiana Erukhimova Lecture 40

Ch. 17 Statics

There is a ladder against a wall. There is no friction at the wall and the coefficient of friction at the floor is . At what angle can the ladder be placed so that it would slip if the angle were decreased infinitesimally?

The advantage of a lever GIVE ME A PLACE TO STAND AND I WILL MOVE THE EARTH

The advantage of a pulley What minimum force F is needed to lift the piano of mass M?

Simple harmonic oscillator

The forces No force Force in –x direction Force in +x direction

More Detail Time

Some Terms Amplitude: Max distance Period: Time it takes to get back to here

A block with mass m is attached to the end of a spring, with spring constant k. The spring is stretched a distance L and let go at t=0 Find the position of the mass at all times Where does the maximum speed occur? What is the maximum speed?