Work and Energy Book Back Answers & Guides
Unit 3 > Science > Class 4 > Samacheer Kalvi - English Medium
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1. ________is said to be done when a force is acting on it.
Correct answer:
Work
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2. The ability to do work is____________ .
Correct answer:
Energy
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3. _______ is a machine made up of wheel and rope
Correct answer:
Pulley
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4. ____________ help us to make work easier.
Correct answer:
Simple machines
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5. An example for inclined plane is_______.
Correct answer:
Ramp
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1. E D G E W
Correct answer:
WEDGE
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2. R L E V E
Correct answer:
LEVER
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3. E W C R S
Correct answer:
SCREW
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1. Class II lever
Correct answer:
Nut cracker
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2. Pulley
Correct answer:
Drawing water
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3. Class I lever
Correct answer:
Seesaw
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4. Wheel and axle
Correct answer:
Bicycle
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5. Renewable resource
Correct answer:
Wind
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1. Spade
Correct answer:
Class III lever
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2. Seesaw
Correct answer:
Class I lever
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3. Wheel barrow
Correct answer:
Class II lever
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4. Plier
Correct answer:
Class I lever
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5. Nail cutter
Correct answer:
Class I lever