Inclined Plane, Wedge, and Screw

friction

A major problem in the use of the inclined plane is 

true

A screw is simply a form of an inclined plane.

effort force

A single fixed pulley changes the direction of the ________.

thinner

A wedge has a higher IMA as it gets:

force

An inclined plane reduces the ________ needed to move a load vertically.

1

Each supporting strand of a block and tackle increases the mechanical advantage by ____.

lubricants

Friction can be reduced by using oil or grease, which are ______.

direction

Gears of different sizes change the speed and ______ of force.

length

The mechanical advantage of the inclined plane can be increased by increasing the ramp's horizontal _________.

true

The screw has very low efficiency. 

saw

Which one of the following is not an example of the wedge?

screw

bolt and nut

second-class lever

bottle opener

single fixed pulley

can only fix the direction of a force

third-class lever

forearm

wedge

nail

wheel and axle

pencil sharpener

inclined plane

ramp

first-class lever

see saw

block and tackle

used to lift engine