Question

answer the following: a. Explain how a pulley changes the amount of force needed to lift an object. b. do all pulleys change the amount of force needed to move an object? Justify your answer.

Answer 1

If you want to lift something that weighs 100kg, you have to pull down with a force equivalent to 100kg, which is 1000N (newtons). I hope this helps, please mark brainiest if it does. I will attach a picture I found off the internet to further help you  :)
(There are like 1,000,000,000,000,000,000,000 other ways I could have put that, to make it sound less creepy, I could just edit it now instead of writing this huge thing... oh well lol)