Answer:
The two substances are Grease and Oil.
Explanation:
- <u>Grease</u> is used for other lubrication outside of the engine when it is really cold.
- <u>Oil</u> is used for lubricating when your engine is really hot.
(4.4273 × 10¹⁰)/(5.3668 × 10³) = 0.824 94 × 10⁷ = 8.2494 × 10⁶
If the angle is either 0 or 180, that means that there is either negative or positive work, so A and D are not correct.
If the angle is 45, then there is still some work involved.
The only option where there is no work done by a force is B. when the angle is between the force and displacement is 90.
3rd one sorry if it’s wrong
