Science Study Help

A ___ consists of a wire, rope, or cable on a grooved wheel

• wedge

• lever

• pulley

• screw

Which of the following is not a first class lever?

• scissors

• pliers

• seesaw

• fishing rod

A simple machine with a slanted surface is a(n)

• lever

• wheel & axle

• inclined plane

• pulley

A rigid bar free to move about a fixed point is a ______

• screw

• lever

• wedge

• pulley

Which of the following is a second class lever?

• wheelbarrow

• seesaw

• pliers

• fishing rod

Name the class of the lever

• Class 1

• Class 2

• Class 3

• Class 4

What are the sources of energy for simple machines?

Ignore the "Is exactly" btw

Simple Machines can be used to increase speed

• True

• False

Simple Machines can be used to change the direction of a force

• True

• False

A chainsaw is a type of wedge used to cut wood, it was inspired from which tool from the past?

• Knife

• Stone Axe

• Oldowan Tool

• Plow