Author: Anonymous

How does the perception process (the process of attending to, organizing, and interpreting the information received through our senses) influence how we perceive others in both positive and negative lights? How does the perception process influence how we perceive ourselves and how we talk about ourself to others in both positive and negative lights? And how can we use and overcome errors in person-perception biases (selective perception, stereotyping, halo effects, forced consistency, projection, fundamental attribution error) to improve our social perceptions (more realistic impression of others and validity assessment of your perceptions)? *I provided definitions for the underlined words in the parentheses to aid understanding.

The figure shows a rod bent into a semicircle of radius R on the xy-plane. Semicircle.png What is the position of the center-of-mass of this object? 

An ideal pendulum has a period of 1.0 seconds when it is placed in the lobby of the science building. A student takes the pendulum into an elevator and the elevator accelerates downward at a rate of 2.0 m/s2. What happens to the period of the pendulum?

The Wright Brothers’ plane had a 2.4 m ( diameter) long propeller that operated at a constant 350 rpm (revolutions per minute). Find the acceleration of a particle at the tip of the propeller.

What is the steepest incline on which a vehicle can remain parked without the wheels slipping? The coefficient of static friction between the tires and the incline is 0.90.

A man has a weight of W. He is standing at the center of the string according to the picture. Person_on_Wire.png The magnitude of the Tension in the string

Three different skiers start from rest. They ski from the top of a hill from the same height but take different paths (see the figure). The friction is negligible. Which skier has the largest speed at the bottom of the hill? Three_Skiers_Varying_Track.png

A person is standing on a platform that is free to rotate around a vertical axis (frictionless).  Initially the person and the platform are not rotating. The person holds a wheel in their hands that when viewed from above is rotating in a counterclockwise (ccw) direction. The person flips the wheel over so now viewed from above it is rotating in a clockwise (cw) direction. Which of the following statements best describes what happens after the wheel is flipped and why? 

By what factor must one change the weight suspended vertically from a spring coil in order to triple its period of simple harmonic motion?

The following graphs show an aspect of motion as a function of time. Take note of the y axis of each graph. Which of the graphs show a motion that has a constant non-zero acceleration? Four_Graphs.png