# 5th Grade Forces And Machines

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| Written by Masterzea
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Masterzea
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Quizzes Created: 2 | Total Attempts: 1,405
Questions: 10 | Attempts: 1,078  Settings  This is a quiz for basic principles of machines and forces.

• 1.

### A magnet is an example of a force occurring in

• A.

Distance

• B.

Contact

• C.

Force

• D.

Lever

• E.

Element

A. Distance
Explanation
The force is applied in distance.

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• 2.

### This car is an example of friction because there is an interaction between the wheels and the dirt.  Friction is a force that occurs in

• A.

Distance

• B.

Contact

• C.

Force

• D.

Lever

• E.

Element

B. Contact
Explanation
Friction is a force that occurs when two objects are in contact with each other and there is a resistance to motion. In this case, the car's wheels are in contact with the dirt, and there is an interaction between them that causes friction. Therefore, the car is an example of contact friction.

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• 3.

### A machine is

• A.

A complex machine.

• B.

A musical instrument.

• C.

An instrument or device that allows us to do tasks with a lot of effort.

• D.

An instrument or device that allows us to do tasks with less effort.

• E.

An instrument or device that allows us to do tasks with no effort.

D. An instrument or device that allows us to do tasks with less effort.
Explanation
The correct answer is "an instrument or device that allows us to do tasks with less effort." This answer is supported by the fact that a machine is typically designed to make tasks easier and more efficient. Machines are created to reduce the amount of physical or mental effort required to perform a task, ultimately making our lives easier.

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• 4.

### These are examples of machine elements:

• A.

Pulley, spring, wheel, axle.

• B.

Spring, car, wheel, pulley.

• C.

Spring, axle, pulley, wheel.

• D.

Car, pulley, spring, wheel.

• E.

Spring, wheel, axle, gear.

E. Spring, wheel, axle, gear.
Explanation
The correct answer is "Spring, wheel, axle, gear." This combination includes all the listed machine elements, namely a spring, a wheel, an axle, and a gear. The other options either miss one or more elements or include elements that are not listed.

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• 5.

### This is a simple machine called a lever.  The lever has three parts, in the example of the picture the parts from left to right are:

• A.

Suzy, Sara and Jorge.

• B.

Fulcrum, effort, and resistance

• C.

Resistance, fulcrum, and effort.

• D.

Fulcrum, resistance, and effort.

• E.

Resistance, effort, fulcrum

C. Resistance, fulcrum, and effort.
Explanation
The correct answer is "Resistance, fulcrum, and effort." In a lever, the resistance is the load or weight being lifted, the fulcrum is the pivot point or support, and the effort is the force applied to move the resistance. This order is important because the lever works by magnifying the effort force to overcome the resistance force.

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• 6.

### This is a

• A.

Simple machine.

• B.

Compound machine

• C.

Element of a machine

• D.

Itone

• E.

Music machine

B. Compound machine
Explanation
A compound machine is a combination of two or more simple machines working together to perform a specific task. Since the question states "This is a simple machine," it implies that the given object is not just a single simple machine but a combination of multiple simple machines. Therefore, the correct answer is compound machine.

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• 7.

### This is an example of a

• A.

Simple machine.

• B.

Compound machine.

• C.

Element of a machine.

• D.

Wheel.

• E.

Music machine.

A. Simple machine.
Explanation
The question is asking for the classification of the given example. The term "simple machine" refers to a basic mechanical device that helps to perform work, such as a lever or pulley. Since the example does not mention any complexity or combination of multiple machines, it can be classified as a simple machine.

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• 8.

### This is a gear and it is an example of an

• A.

Simple machine.

• B.

Compound machine.

• C.

Element of a machine.

• D.

Axle.

• E.

Music machine.

C. Element of a machine.
Explanation
The given object is identified as a gear, which is a fundamental component of a machine. Gears are used to transmit motion and power between different parts of a machine, allowing it to perform its intended function. Therefore, the gear can be categorized as an element of a machine.

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• 9.

### In this pulley if I apply a force in P down the pulley changes the direction of W and it goes

up
Explanation
When a force is applied in the downward direction at point P on the pulley, it causes a change in the direction of the weight (W) attached to the pulley. As a result, the weight moves in the upward direction.

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• 10.

### The force of the airplane is acting _________________ and this moves the airplane _______________.

• A.

Forward -- forward

• B.

Backward -- backward

• C.

Forward -- backward

• D.

Backward -- forward

• E.

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