Work and Simple Machines

Which type of lever is this with the fulcrum in the middle?

• First

• Second

• Third

Work = force x _______________

• energy

• height

• distance

• sunlight

Tags

NGSS.HS-PS2-1

A screw is an inclined plane wrapped around a cylinder.

• True

• False

What is a simple machine that has 2 incline planes back to back?

• incline plane

• screw

• fulcrum

• wedge

How does a fixed pulley allow you to decrease your effort?

• Increases the pull weight of the object being lifted

• Decreases the amount of distance of applied force

• Increases the distance and direction of the applied force

Which of the following is an example of work being done?

• standing at your desk

• holding a 100-pound barbell

• pushing against a stationary wall

• pushing a lawnmower 100 yards

Which of the following is an example of NO work being done?

• holding an object still above the floor of a room

• lifting an object from the floor of the room

• pushing an object across the floor of a room

• bouncing an object on the floor of a room

The ratio of output work to the input work

• Power

• Efficiency

• Work

• Mechanical advantage

Work can be defined as

• a force exerted on an object

• a push or pull exerted on an object

• movement of an object without a force

• a force exerted on an object that causes it to move

The position of the _______ determines what lever it is.

• Joule

• fulcrum

• wedge

• screw