Formulate questions about the information mentioned in a given passage.
--------
Question: context: A person is trying to roll a microwave, an egg, a book, and a block.

Answer: What are the things that a person is trying to roll?


Question: context: Four balls are dropped. The first is dropped from the height equivalent of a microwave, the second is dropped from the height equivalent of a book, the third is dropped from the height equivalent of a car, and the fourth is dropped from the height equivalent of a table.

Answer: What are the things that are dropped?


Question: context: A brick, a microwave, a coin, and an apple moving at identical speeds each collide with a static hockey puck.

Answer:
What are the things that are moving at identical speeds?