Đòn bẩy

Multiple Choice

Which items can be used to create a simple lever in a classroom experiment?

• Ruler, pen, eraser

• Book, pencil, paper

• Scissors, glue, notebook

• Marker, stapler, tape

Multiple Choice

Which of the following items can be used to create a simple lever experiment as shown in the image?

• Pencil, ruler, eraser

• Pencil, pen, book

• Pen, ruler, scissors

• Book, eraser, glue

Open Ended

What are some methods or tools that can help lift heavy objects without directly applying force in the vertical direction?

Open Ended

What is the role of levers? What types of levers are there? How are levers used?

Open Ended

What questions can you ask to learn about how levers change the direction of force?

Open Ended

List some examples of using levers in daily life.

Multiple Choice

Which of the following statements best describes the main function of a lever?

• A lever increases the speed of an object.

• A lever changes the direction of force applied.

• A lever reduces the mass of an object.

• A lever generates electricity.

Multiple Choice

Which part of the simple lever model (Hình 19.3) corresponds to the objects used in the classroom experiment (Hình 19.2)?

• The ruler corresponds to the lever, the pen to the fulcrum, and the book to the load.

• The pen corresponds to the lever, the ruler to the fulcrum, and the book to the load.

• The book corresponds to the fulcrum, the ruler to the lever, and the pen to the load.

• The ruler corresponds to the load, the pen to the lever, and the book to the fulcrum.

Open Ended

Explain how a lever can change the direction of force applied to an object.

Open Ended

List some examples of using a lever to change the direction of force.

Multiple Select

Which of the following are examples of using a lever to change the direction of force?

• Using a crowbar to lift a rock

• Playing on a seesaw

• Pushing a box across the floor

• Opening a door with a handle

Multiple Choice

What is the main function of a lever as described in the lesson?

• To change the direction of force applied to an object

• To increase the speed of an object

• To reduce the weight of an object

• To create energy

Open Ended

Explain how the position of the fulcrum affects the way a lever works.

Multiple Choice

Which of the following is an example of a type 1 lever?

• Scissors

• Wheelbarrow

• Nutcracker

• Tweezers

Open Ended

Give some examples of each type of lever in real life.

Multiple Choice

Which of the following statements about levers is correct?

• Levers always have the fulcrum in the middle.

• Levers can be classified into three types based on the position of the fulcrum, load, and effort.

• Levers are only used in engineering.

• Levers cannot change the direction of force.

Multiple Choice

Based on the position of the fulcrum, load, and effort, how are levers classified?

• Levers are classified by their length.

• Levers are classified by the position of the fulcrum, load, and effort.

• Levers are classified by their color.

• Levers are classified by their material.

Open Ended

What steps should be followed when using a lever in practice?

Open Ended

Is there a way to lift an object without applying force directly in the vertical direction?