Answer to Question #84855 in Mechanics | Relativity for Christian

Question

(1) A 1,500 kg car is moving along a level road of 60 km/h. What work is required to stop the car?

(2) At room temperature, an oxygen molecule, with mass 5.31 x 10^(–26) kg, typically has a kinetic energy of 6.21 x 10^(–21) J. How fast is the molecule moving?

(3) A 7.0-kg monkey swings from one branch to another 1.2 m higher. What is the change in potential energy? (acceleration due to gravity g = 9.80 m/s2)