Diagnosis 5th grade

Machines are tools that transform movement and forces to make daily activities easier. For example, a simple machine like the lever can make it easier to lift heavy objects. In this context, imagine you are using a lever to move a heavy rock. What type of machine is the lever?

• a. Compound machine

• b. Simple machine

• c. Electric motor

• d. Hydraulic system

2. A wheel transmits its movement to another wheel through a belt. This system, like gears, is used to move objects through the rotation of the wheels. If one wheel turns and transmits the movement to another via a belt, what is this system called?

• a. Pulley

• b. Gear

• c. Lever

• d. Inclined plane

Humans have used the wheel since ancient times. In this case, the wheel has the ability to rotate around an axis, which helps facilitate the movement of vehicles and other objects. Which of the following characteristics is specific to the wheel?

• 1. It rotates around an axis

• 2. It is square-shaped

• 3. It is part of compound machines

• 4. It only moves heavy loads

A fundamental machine that uses wheels and ropes to make moving objects easier is the pulley. If you see a system in which a rope moves through a wheel, what machine are you referring to?

• 1. Rack and pinion

• 2. Pulley

• 3. Lever

• 4. Inclined plane

Compound machines are made up of many parts and combine several simple machines to perform a task. If you had to choose an example of a compound machine, which one would it be?

• 1. The lever

• 2. The computer

• 3. The pulley

• 4. The bicycle

Simple machines, such as levers and inclined planes, have specific functions that make tasks easier. In this case, if you are using a ramp or a staircase, what type of simple machine are you using?

• 1. Inclined plane

• 2. Lever

• 3. Wheel

• 4. Gear

Humans have been building stairs since ancient times to make it easier to reach higher places. Considering that stairs help you ascend with less effort, which simple machine do they derive from?

• 1. Lathe

• 2. Wheel

• 3. Lever

• 4. Inclined plane

In a pulley system, a rope runs over a wheel to lift or move objects. When the pulley is fixed and the rope is pulled to lift an object, what is the advantage of using this machine?

• 1. It increases the distance traveled

• 2. It reduces the force needed to lift the object

• 3. It increases the weight of the object

• 4. It decreases the speed of movement

When using a lever, the position of the fulcrum, effort, and load determine how the machine works. If the fulcrum is placed close to the load, what happens to the effort needed to lift the load?

• 1. The effort increases

• 2. The effort decreases

• 3. The effort remains the same

• 4. The effort depends on the weight of the load

A wheel is used to move things more easily. What happens when a wheel turns?

• 1. The object moves without effort

• 2. The object moves downward

• 3. The object moves in a straight line

• 4. The object moves through the air