A lost bird flies forward and backward in a straight line. Its motion is shown on the following graph of horizontal position T vs. time t. I(m) 2- h t(s)

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

What is the equation for electrical work?

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?