Subject: Science, asked on 24/5/18

## Question:Verify and justify the following with reason:"More force is required to push a box when it is at rest than when it starts moving"{4 marks}

Subject: Science, asked on 23/5/18

## State the factor on which the friction depends and does not depends.

Subject: Science, asked on 23/5/18

## plz read this carefully and answer : If block A is moving on block B ,and both the blocks are moving and in the same direction and speed ,then there is no relative motion between block A and block B . But block B is moving on ground so there exists a relative motion between block B and the ground , no matter block B is moving or not .plz tell me i am right or wrong about this concept .Also tell what will happen if the blocks are moving with unequal speed or in the opposite direction .

Subject: Science, asked on 18/5/18

## Place a tennis ball on the hard smooth of a table. Blow the ball. What will happen to the ball ? Now cover the table with a sheet (table cloth ). Place the table tennis ball over the sheet and blow at it. What will happen to ball now. Give reason for both the case.

Subject: Science, asked on 17/5/18

## Make sure your hands are dry. Rub them together briskly so that you create a lot friction. Observe the heat in your hands. Now add some hand lotion and rub them again. What happened this time? Note your finding on A4 size sheet and write down why friction is considered necessary evil.

Subject: Science, asked on 17/5/18

## Take an inclined plane , take two halves of the chart paper . Spread some pebbles on one of them and sand on the other ( a thin layer). Gently release the ball on the inclined plane . Observe the ball rolling down over the spread of pebbles and note the distance moved by the ball . Repeat the experiment with the sand spread on chart paper and then on a plain paper. Enter your observation in the table.

Subject: Science, asked on 30/4/18

## ​​Below question that I am asking is not related to syllabus, but it is my Summer Vacation Homework...QUESTION- Explain about  Archimedes' Screw and its uses in day to day life with the help of proper diagrams  in simple words in about 150 to 200 words. {Please don't provide any web link or certified answer or also don't provide an copy pasted answer from any source on internet like from WIKIPEDIA ... I want only experts answer because this is my activity in form of homework that would be evaluated ... If there would be direct copy paste from internet my marks may be deducted.  ... Experts, Kindly Answer... } ​​​

Subject: Science, asked on 12/3/18

## Solve this: ​Q4. If I = static friction, II = sliding friction and III= rolling friction, then which of the following is correct          A) III > I > II                                        B) II > I > III         C) I > II > III                                        D) I > III > II

Subject: Science, asked on 9/3/18

## Tetan Gupta sir (Meritnation Expert),You had answered one of my questions before 5 minutes, But, I am unable to understand that answer, it is very complex and  short to understand. The question was:Perform an experiment or an activity to show that "Rolling friction < Static friction".

Subject: Science, asked on 9/3/18

## Question:- Perform an experiment or an activity to show that "Rolling friction < Static friction".{Please I want only experts answer... Don't provide any web link or certified answer}

Subject: Science, asked on 9/3/18

## ​Question:- With the help of an activity or an experiment, Show that "Sliding friction < Static friction " {Please don't provide any certified answer or web link ... I want only experts answer}

Subject: Science, asked on 22/2/18

## Explain the types of friction

Subject: Science, asked on 22/2/18

## Name a method to _ A) Reduce friction B) Increase friction

Subject: Science, asked on 20/2/18

## Pls solve this question Q7. We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. Which metal sheet will shine more and why ?

Subject: Science, asked on 20/2/18

## 6. When the cutting edge of a knife is put against a fast rotating stone to sharpen it, sparks are seen. Why? 7. We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. Which metal sheet will shine more and why?

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