Hi guys! Today I am going to be telling you about pulleys. A pulley helps lift somthing that is very heavy.
There are 4 different types of pulleys. The types of pulleys are a fixed pulley, movable pulley, compound pulley, and a block & tackle pulley. A pulley is made out of a axel and a wheel. The more strings you have atachted to the object the easier it is to lift the object.
A fixed pulley is a pulley were you pull the rope down to lift the object up. A fixed pulley is made out of a axel.
A movable pulley is a pulley that is movable. In a movable pulley you lift the string up to pull the object up.
A compound pulley is a pulley with two wheels and two axels. One axel and whell is at the top of the pulley and the other axel and whell is at the bottom of the pulley. To lift up the object you pull the rope down.
A block and tackle pulley is a pulley that has two wheels and axels. the wheel and axels are both on top of eachother in the block and tackle pullley. In the block and tackle pulley you pull the string down to lift the object up.
Today I made a fixed pulley. I made a groove out of tinfoil. I used three cups as the base and attachted them with red electric tape. i used pink string as the rope to pull the sharpener up.
That hade a lot of examples of pulleys! thanks for sharing
Hi Raisa! Me and Saphire2888 we’re making a cardboard hotel. We needed
An elevator and your pulley post on your blog helped us make an elevator for are doll hotel! Thanks for the lesson on pulleys we used the moveable pulley so they can walk straight in the door and up the elevator!
ChloeCutie and Saphire2888
I liked that you included all the kinds of pulleys! it was really cool