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प्रश्न
Select the correct alternative.
Friction
पर्याय
promotes motion
opposes motion
acts in the direction of motion
is always a nuisance
उत्तर
opposes motion
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संबंधित प्रश्न
An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms.
To stretch the bow, the archer applies a force that causes a change in its ______.
Write true or false.
A wet oily road offers more friction than a dry rough road.
Fill in the blank.
On squeezing a gum tube, its ............. changes.
What effect can a force produce on a body which is not allowed to move?
State the effect produced by a force in the following case:
A player uses his stick to deflect the ball.
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 the following in short.
Why does a charged balloon stick to a wall?
Answer the following in detail.
Why do all objects have a tendency to fall towards the centre of the earth?
What is momentum? Write its SI unit. Interpret force in terms of momentum. Represent the following graphically
(a) momentum versus velocity when mass is fixed.
(b) momentum versus mass when velocity is constant.
Two women are of the same weight. One wears sandals with pointed heels while the other wears sandals with flat soles. Which one would feel more comfortable while walking on a sandy beach? Give reasons for your answer.
