Machine — Practice Questions

Question 1

Machines help us move loads using:

Accepted Answer

less force (effort) — Machines let us use less effort.

Question 2

A see-saw and a crowbar are examples of a:

Accepted Answer

lever — These are levers.

Question 3

Toothed wheels that turn each other are called:

Accepted Answer

gears — Toothed wheels are gears.

Question 4

A pulley is useful because it lets you:

Accepted Answer

pull down to lift a load up — A pulley changes the direction of your effort.

Question 5

Machines make work easier by changing the size or ___ of a force.

Accepted Answer

direction — Machines change a force's size or direction.

Question 6

Using a long lever to lift a heavy rock means you need:

Accepted Answer

less effort — A longer lever needs less effort to lift a load.