 MCAS Physics Exams MCAS 2018 Session 1                     Open-Response Questions
• BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION.
• If you do the work in your head, explain in writing how you did the work.

Refer to the following information for the next four questions. a. Describe one example of light being reflected in the living room.

 b. In your Student Answer Booklet, draw a reflected light ray. Label each of the following:   • incident ray • incident angle • normal line • reflected ray • reflected angle

 c. Describe one example of light being refracted in the living room.

 d. Describe what happens when light is refracted.

Refer to the following information for the next four questions. A person places an object on the shelves.   a. At which location on the shelves (W, X, Y, or Z) would the object have the most gravitational potential energy? Explain your answer.

 A book with a mass of 0.21 kg is placed at location X. A magazine with a mass of 0.11 kg is placed at location Y.   b. Does the book or the magazine have more potential energy? Show your calculations and include units in your answer.

 A 2.5 kg object is placed at location X where it has 10 J of potential energy. A person bumps the shelf, causing the object to fall to the ground.   c. Assuming air resistance is negligible, explain how conservation of energy is demonstrated as the object falls to the ground.

 d. Calculate the speed of the 2.5 kg object just before it hits the ground. Show your calculations and include units in your answer.