Brandi poses as Lady Justice for a skit in her government class. She holds a set of scales above her head with her right hand and a sword by her side in her left hand. She holds the pose for 10 minutes. At the end of the skit, she mentions to her friend that it was a lot of work to pose and that her arms were really tired. Which best summarizes Brandi’s statement about doing work while posing? She did no work because she did not exert any forces on objects. She did more work using her right hand than her left because her right hand was higher. She did no work because she did not move the scales or sword while she posed. She did work the entire time she posed because she was tired at the end.

The correct answer is C. She did no work because she did not move the scales or sword while she posed.

Explanation:

In physics, the term "work" is used to refer to the energy or force related to the displacement of an object. Indeed, this variable is calculated through the formula W (work) = F (force) x d (displacement). This implies, there is only work if there is displacement. According to this, Brandi did no work while posing because even if she used her force to hold the scales and sword she did not move and displacement is essential for work to exist. Thus, the correct option is C.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles