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All questions of Simple Machines for Class 6 Exam
What is the main advantage of using a lever?- a) It changes the direction of force
- b) It does not require any input
- c) It can only lift small weights
- d) It allows lifting heavy weights with less effort
Correct answer is option 'D'. Can you explain this answer?
What is the main advantage of using a lever?
a)
It changes the direction of force
b)
It does not require any input
c)
It can only lift small weights
d)
It allows lifting heavy weights with less effort
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Clifford Academy answered |
The primary advantage of using a lever is that it enables the lifting of heavy weights with significantly less effort by utilizing the mechanical advantage based on the position of the fulcrum and the lengths of the effort and load arms.
What is the primary function of simple machines?- a) To help us do work with less effort
- b) To replace human labor completely
- c) To increase the weight of objects
- d) To create energy
Correct answer is option 'A'. Can you explain this answer?
What is the primary function of simple machines?
a)
To help us do work with less effort
b)
To replace human labor completely
c)
To increase the weight of objects
d)
To create energy
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Clifford Academy answered |
Simple machines are designed to assist in performing tasks by reducing the amount of effort needed. They achieve this by changing the direction or magnitude of the force applied, making work easier for us.
What is the mechanical advantage of a fixed pulley?- a) Equal to 1
- b) Greater than 1
- c) Less than 1
- d) Variable
Correct answer is option 'A'. Can you explain this answer?
What is the mechanical advantage of a fixed pulley?
a)
Equal to 1
b)
Greater than 1
c)
Less than 1
d)
Variable
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Clifford Academy answered |
A fixed pulley has a mechanical advantage equal to 1. It changes the direction of the force applied but does not reduce the amount of effort needed to lift a load.
Why is it important to maintain machines?- a) To ensure they work efficiently and last longer
- b) To prevent them from rusting
- c) To increase their weight
- d) To enhance their aesthetic appeal
Correct answer is option 'A'. Can you explain this answer?
Why is it important to maintain machines?
a)
To ensure they work efficiently and last longer
b)
To prevent them from rusting
c)
To increase their weight
d)
To enhance their aesthetic appeal
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Clifford Academy answered |
Regular maintenance of machines is essential to ensure their efficiency, longevity, and proper functioning by minimizing wear and tear, reducing friction, and preventing rust.
How does a screw function as a simple machine?- a) By changing the direction of force
- b) By reducing friction
- c) By holding objects together and lifting items
- d) By increasing speed
Correct answer is option 'C'. Can you explain this answer?
How does a screw function as a simple machine?
a)
By changing the direction of force
b)
By reducing friction
c)
By holding objects together and lifting items
d)
By increasing speed
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Clifford Academy answered |
A screw functions by wrapping an inclined plane around a rod, allowing it to hold materials tightly and lift objects with less effort, essentially acting as both a fastener and a lifting device.
What is the relationship between work and energy?- a) They are unrelated concepts
- b) Energy is the cause and work is the effect
- c) Work creates energy
- d) Work is a type of energy
Correct answer is option 'B'. Can you explain this answer?
What is the relationship between work and energy?
a)
They are unrelated concepts
b)
Energy is the cause and work is the effect
c)
Work creates energy
d)
Work is a type of energy
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Clifford Academy answered |
Energy is the capacity to do work, making it the cause of work. When energy is applied to perform tasks, work is the observable effect of that energy.
Which type of lever always has a mechanical advantage greater than 1?- a) All types of levers
- b) Class III lever
- c) Class II lever
- d) Class I lever
Correct answer is option 'C'. Can you explain this answer?
Which type of lever always has a mechanical advantage greater than 1?
a)
All types of levers
b)
Class III lever
c)
Class II lever
d)
Class I lever
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Clifford Academy answered |
Class II levers always have a mechanical advantage greater than 1 because the load is positioned between the effort and the fulcrum, allowing less effort to lift heavier loads.
Which of the following is NOT one of the six types of simple machines?- a) Inclined plane
- b) Hydraulic press
- c) Pulley
- d) Lever
Correct answer is option 'B'. Can you explain this answer?
Which of the following is NOT one of the six types of simple machines?
a)
Inclined plane
b)
Hydraulic press
c)
Pulley
d)
Lever
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Clifford Academy answered |
A hydraulic press is not classified as a simple machine; it is a complex machine that uses hydraulic force. The six basic types of simple machines are lever, inclined plane, pulley, screw, wheel and axle, and wedge.
What is an example of a wedge?- a) A lever
- b) A bicycle
- c) A pulley
- d) A knife
Correct answer is option 'D'. Can you explain this answer?
What is an example of a wedge?
a)
A lever
b)
A bicycle
c)
A pulley
d)
A knife
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Clifford Academy answered |
A knife is an example of a wedge, as it has two slanting sides that converge to a sharp edge, allowing it to cut or split objects with ease due to the concentrated pressure at the tip.
What is an ideal machine's efficiency?- a) 50%
- b) 100%
- c) 75%
- d) 0%
Correct answer is option 'B'. Can you explain this answer?
What is an ideal machine's efficiency?
a)
50%
b)
100%
c)
75%
d)
0%
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Clifford Academy answered |
An ideal machine is considered to have 100% efficiency, meaning all input energy is converted into useful output work without any losses. However, such machines do not exist in reality due to energy losses.
What happens when energy is converted into work?- a) Work is done without any energy input
- b) Some energy is always lost as heat
- c) Efficiency increases to 100%
- d) Energy is created
Correct answer is option 'B'. Can you explain this answer?
What happens when energy is converted into work?
a)
Work is done without any energy input
b)
Some energy is always lost as heat
c)
Efficiency increases to 100%
d)
Energy is created
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Clifford Academy answered |
When energy is converted into work, some of it is inevitably lost as heat due to friction or other factors. This is why no machine can achieve 100% efficiency.
In a Class II lever, where is the load located?- a) At the fulcrum
- b) Above the effort
- c) At the end of the lever
- d) Between the fulcrum and the effort
Correct answer is option 'D'. Can you explain this answer?
In a Class II lever, where is the load located?
a)
At the fulcrum
b)
Above the effort
c)
At the end of the lever
d)
Between the fulcrum and the effort
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Clifford Academy answered |
In a Class II lever, the load is positioned between the fulcrum and the effort. This arrangement allows for greater mechanical advantage, making it easier to lift heavy objects.
What effect does the lead of a screw have on its mechanical advantage?- a) The lead does not affect mechanical advantage
- b) The lead only affects the speed of the screw
- c) The larger the lead, the higher the mechanical advantage
- d) The smaller the lead, the higher the mechanical advantage
Correct answer is option 'D'. Can you explain this answer?
What effect does the lead of a screw have on its mechanical advantage?
a)
The lead does not affect mechanical advantage
b)
The lead only affects the speed of the screw
c)
The larger the lead, the higher the mechanical advantage
d)
The smaller the lead, the higher the mechanical advantage
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Clifford Academy answered |
The lead of a screw refers to the distance between threads. A smaller lead means that the screw can lift heavier loads more easily, thus providing a greater mechanical advantage.
What does mechanical advantage (M.A.) indicate about a machine?- a) The material used in the machine's construction
- b) The speed of the machine
- c) How much a machine helps us do work
- d) The amount of energy a machine generates
Correct answer is option 'C'. Can you explain this answer?
What does mechanical advantage (M.A.) indicate about a machine?
a)
The material used in the machine's construction
b)
The speed of the machine
c)
How much a machine helps us do work
d)
The amount of energy a machine generates
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Clifford Academy answered |
Mechanical advantage is a measure of how much a machine amplifies the applied force. A higher M.A. means less effort is needed to perform work, indicating the machine's effectiveness in assisting with tasks.
Why do we feel tired after prolonged physical activity?- a) We become dehydrated
- b) We lose energy due to heat
- c) Our bodies use up energy to perform work
- d) We are not using machines
Correct answer is option 'C'. Can you explain this answer?
Why do we feel tired after prolonged physical activity?
a)
We become dehydrated
b)
We lose energy due to heat
c)
Our bodies use up energy to perform work
d)
We are not using machines
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Clifford Academy answered |
We feel tired after sustained activity because our bodies expend energy to perform work. This energy expenditure leads to fatigue as our energy stores are depleted.
Which of the following examples best illustrates the use of an inclined plane?- a) A bicycle wheel spinning
- b) A ramp for loading goods onto a truck
- c) A child sliding down a slide
- d) Using a lever to lift a rock
Correct answer is option 'B'. Can you explain this answer?
Which of the following examples best illustrates the use of an inclined plane?
a)
A bicycle wheel spinning
b)
A ramp for loading goods onto a truck
c)
A child sliding down a slide
d)
Using a lever to lift a rock
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Clifford Academy answered |
A ramp is a classic example of an inclined plane, which helps move heavy objects up or down with less effort by providing a gradual slope.
What are the two main types of pulleys?- a) Large and small
- b) Vertical and horizontal
- c) Simple and complex
- d) Fixed and movable
Correct answer is option 'D'. Can you explain this answer?
What are the two main types of pulleys?
a)
Large and small
b)
Vertical and horizontal
c)
Simple and complex
d)
Fixed and movable
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|
Clifford Academy answered |
The two main types of pulleys are fixed pulleys, which do not move and change the direction of force, and movable pulleys, which move with the load and reduce the effort needed to lift it.
How do simple machines affect the effort needed to perform work?- a) They reduce the effort needed by changing force application
- b) They eliminate the need for effort
- c) They only speed up the process without reducing effort
- d) They increase the effort needed
Correct answer is option 'A'. Can you explain this answer?
How do simple machines affect the effort needed to perform work?
a)
They reduce the effort needed by changing force application
b)
They eliminate the need for effort
c)
They only speed up the process without reducing effort
d)
They increase the effort needed
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Clifford Academy answered |
Simple machines help reduce the effort needed to perform work by changing the direction of force, allowing for optimal application of effort or amplifying the force applied.
What is the main purpose of using a wheel and axle?- a) To amplify force or increase speed
- b) To create more friction
- c) To reduce the time taken to perform work
- d) To make objects heavier
Correct answer is option 'A'. Can you explain this answer?
What is the main purpose of using a wheel and axle?
a)
To amplify force or increase speed
b)
To create more friction
c)
To reduce the time taken to perform work
d)
To make objects heavier
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Clifford Academy answered |
The wheel and axle system can function as either a force multiplier, making it easier to move heavy objects, or as a speed multiplier, allowing for faster movement, depending on how it is utilized.
Which of the following statements about work is true?- a) Work occurs only when an object changes shape
- b) Work is done only when a force moves an object in the opposite direction
- c) No work is done if an object does not move, even if a force is applied
- d) Work can be done without applying any force
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements about work is true?
a)
Work occurs only when an object changes shape
b)
Work is done only when a force moves an object in the opposite direction
c)
No work is done if an object does not move, even if a force is applied
d)
Work can be done without applying any force
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Clifford Academy answered |
Work is defined as the application of force over a distance. If there is no movement, even with applied force, no work is accomplished.
Chapter doubts & questions for Simple Machines - Physics Class 6 ICSE 2025 is part of Class 6 exam preparation. The chapters have been prepared according to the Class 6 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 6 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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Physics Class 6 ICSE
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