A car with a mass of 1000kg isat rest at a stoplight. When the light turns green, it is pushed by a net force of 2000 N for 10 s. What is the value of the impulse

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

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.

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.