Dane is going to the hospital when he realizes that he has left his wallet at home. He calls his mom, who opens a window and throws Dane’s wallet down at an angle 23 below the horizontal. His Mom throws the wallet at a speed of 4.2 m/s, and the wallet leaves her hand at a height 2.0 m above the ground. How far from the base of the house does the wallet reach the ground?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.