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Padmavati Dhariya
Subject: Science
, asked on 20/2/18
Please answer 6 question
6.
When the cutting edge of a knife is put against a fast rotating stone to sharpen it, sparks are seen. Why?
Answer
1
Padmavati Dhariya
Subject: Science
, asked on 20/2/18
Solve this:
Q.8. You might have observed that when used for a long time, slippers with rubber soles become slippery. Explain the reason.
Answer
3
Padmavati Dhariya
Subject: Science
, asked on 20/2/18
Plz answer 5 question
Q.5. A father and son pushed their car to bring it to the side of road as it has stalled in the middle of the road. They experienced that although they had to push with all their might initially to move the car, the push required to keep the car rolling was smaller, once the car started rolling. Explain.
Answer
3
Padmavati Dhariya
Subject: Science
, asked on 20/2/18
The handle of a cricket bat or badminton racket is usually rough. Explain the reason.
Answer
2
Padmavati Dhariya
Subject: Science
, asked on 20/2/18
Plz answer the 2nd question...
Q.2. Two boys are riding their bicycles on the same concrete road. One has new tyres on his bicycle while the other has tyres that are old and used. Which one of them is likely to slip while moving through a patch of the road which has lubricating oil spilled over it?
Answer
2
Swastik Sharma
Subject: Science
, asked on 15/2/18
Solve this :
Please do not refer to any other query
8. The speed-time graph for a car is shown in figure 1.58.
(a) Find how far does the car travel in first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during this period ?
(b) Which part of the graph represents uniform motion of the car ?
Answer
1
Bartta Dutta
Subject: Science
, asked on 11/2/18
What is the normal reaction force proportional to when a block pulled with a spring balance showing a reading of 5 Newton?
Answer
1
Bartta Dutta
Subject: Science
, asked on 11/2/18
Fill in the blanks:- reaction force is proportional to ______ if block just start moving with application of force 10 Newton
Answer
2
Shreya Krishnan
Subject: Science
, asked on 8/2/18
Give reasons - a) kabaddi players rub their hand with soil ? b) oil is applied to the moving part of the machine ??
Answer
2
Shreya Krishnan
Subject: Science
, asked on 8/2/18
Give reasons - Sparks are produced when a pair of scissors is sharpened against a grinding wheel ???
Answer
2
Shreya Krishnan
Subject: Science
, asked on 8/2/18
What do you mean by the term friction ? State the factors on which it depends ?
Answer
2
Srijita Majumder
Subject: Science
, asked on 29/1/18
Do fluids exert friction on the bodies moving through them? Give reasons to support your answer.
Answer
2
Srijita Majumder
Subject: Science
, asked on 29/1/18
Why are the tyres of vehicles made corrugated and rough?
Answer
4
Armaan Barak
Subject: Science
, asked on 20/1/18
A wooden box is easier to drag on a cemented floor rather than a rough floor. Explain
Answer
2
Anuradha Chikane
Subject: Science
, asked on 11/1/18
difference between friction and drag ??
Answer
1
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What are you looking for?
6. When the cutting edge of a knife is put against a fast rotating stone to sharpen it, sparks are seen. Why?
Q.8. You might have observed that when used for a long time, slippers with rubber soles become slippery. Explain the reason.
Q.5. A father and son pushed their car to bring it to the side of road as it has stalled in the middle of the road. They experienced that although they had to push with all their might initially to move the car, the push required to keep the car rolling was smaller, once the car started rolling. Explain.
Q.2. Two boys are riding their bicycles on the same concrete road. One has new tyres on his bicycle while the other has tyres that are old and used. Which one of them is likely to slip while moving through a patch of the road which has lubricating oil spilled over it?
8. The speed-time graph for a car is shown in figure 1.58.
(a) Find how far does the car travel in first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during this period ?
(b) Which part of the graph represents uniform motion of the car ?