Explain the following: AT: 5 1. Explain if it is possible to drive a car around a circular arc without any acceleration. T:1.5 2. Describe a situation where an object is in motion, but no physical work is being accomplished. Explain why there is no work being done in this case. T:1.5 3. Explain the significance of the statement, "friction is a necessary evil" in your own words using an example A: 2