To not get anyone confused with my question, The file is down below, Please go to page 12 to answer the question. Q11 (a) A book lies on top of a table. A light bulb hangs from the ceiling, but is not directly above the table
There is only one source of light in the room

four people are standing in the room, at positions A, B, C And D

(i) Explain why all four people can see the book. [5]

The book is replaced by a plane mirror lying flat on the table.

(ii) How many of the people can see the bulb reflected in the room. [5]

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?