A red car travels East at 8m/s. It passes another car that’s traveling west 8m/s. Which of the following is true about these cars?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.