This model shows the different positions of a person on a swing. Consider each of the energy graphs (A-C). Which one most accurately shows the energy of the person at position 1? A. Kinetic Energy is red

B. Kinetic Energy is blue

C. Potential Energy is red

D. Potential Energy is blue

E. There's no way to determine a key

The slope of a velocity time graph over any interval of time gives the during that interval

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%

You are your friend move a new refrigerator into his kitchen. you apply a horizontal force of 252 n in the negative x direction to try and move the 56 kg refrigerator. the coefficient of static friction is 0.61. (a) how much static frictional force does the floor exert on the refrigerator? give both magnitude (in n) and direction. magnitude n direction (b) what maximum force (in n) do you need to apply before the refrigerator starts to move?