Questions · Page 2 of 2

[1 Mark Question Answer]

Question 511 Mark
Answer the following in a word or two or in a sentence.
What do you understand by magnetic force?
Answer
The force of attraction that results between a magnet and another object is called magnetic force.
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Question 521 Mark
Answer the following in a word or two or in a sentence.
Name the force that is responsible for the falling of a stone from a height to the ground.
Answer
Gravitational force
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Question 531 Mark
Answer the following in a word or two or in a sentence.
Which type of force acts on a string pulled from both ends?
Answer
Tension (contact force)
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Question 541 Mark
Answer the following in a word or two or in a sentence.
Which force is responsible for supporting the weight of a book placed on a table?
Answer
Normal force (contact force)
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Question 551 Mark
Answer the following in a word or two or in a sentence.
Give an example in which a force can change the direction of an object.
Answer
A moving bicycle changes its direction when a force is applied to steer its handle.
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Question 561 Mark
Solve the crossword puzzle.
Across
1. Type of force which depends upon the roughness of a surface
2. An effect of friction
3. The force of friction caused due to fluids
4. Type of friction acting between two bodies at rest
5. Type of friction which occurs when applied force overcomes static friction
6. A special body design to enable minimum drage Down
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Question 571 Mark
Give a reason for the following.
Brake handles of motorcycles are generally covered with a toweled cloth?
Answer
Rough toweled cloth on the handles of motorbike provides a good grip increasing the friction and we have better control in holding the handles.
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Question 581 Mark
Give a reason for the following.
Boats and ships have streamlined shapes?
Answer
Streamlined shapes experience minimum drag (fluid friction) while traveling through air and water. Hence, boats and ships are given a streamlined shape.
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Question 591 Mark
Answer the following in short.
List the various states of matter that offer frictional force?
Answer
The force of friction is offered by all the three states of matter – solids, liquids, and gases.
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Question 601 Mark
Answer the following in short.
Why do wrestlers rub powder on their hands before getting into the ring?
Answer
In order to prevent their hands from slipping over their opponent’s body. The powder increases friction.
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Question 611 Mark
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
Answer
Sliding friction can be changed into rolling friction easily by providing wheels or ball bearings to the objects to reduce friction and facilitate easy movement.
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Question 621 Mark
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
Answer
Oiling or lubricating.
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Question 631 Mark
Answer the following in a word or two or in a sentence.
Name the force responsible for opposing the motion between two bodies in contact.
Answer
Frictional force (friction)
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Question 641 Mark
Answer the following in a word or two or in a sentence.
Why is difficult for a pen to leave a mark on a highly smooth plastic sheet?
Answer
Because the smooth surface has very less friction.
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Question 651 Mark
Answer the following in a word or two or in a sentence.
A child tries to slide a wooden block on the top of a table, but she is unable to get a smooth movement. What material do you suggest she should use in between the block and the table to get a smooth movement?
Answer
Can use pencils as rollers under the wooden block.
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Question 661 Mark
Answer the following.
Define weight.
Answer
The gravitational force acting on an object is called the weight of the object.
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Question 671 Mark
Answer the following.
What do you understand by a force?
Answer
Force is a push or pulls acting upon an object as a result of its interaction with another object.
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[1 Mark Question Answer] - Page 2 - PHYSICS STD 6 Questions - Vidyadip