8th Class Physics Friction Question Bank

done Friction IIT JEE Objective Problems

• question_answer1) Which of the following mechanical systems will produce the maximum amount of heat because of friction?

  A)

  B)  

  C)  

  D)  

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• question_answer2) The given figure shows three identical carom boards labeled I, II, and III. Sand particles have been poured on board I and oil has been poured on board II.

  Equal forces are applied on three identical pucks on the three carom boards such that their speeds on the three carom boards are \[{{v}_{1}},{{v}_{2}}\]and \[{{v}_{3}}\] respectively. The relation among the speeds of the pucks on the three carom boards is

  A)  \[{{v}_{1}}>{{v}_{3}}>{{v}_{2}}\]                             

  B)  \[{{v}_{1}}<{{v}_{3}}<{{v}_{2}}\]

  C)  \[{{v}_{1}}>{{v}_{2}}>{{v}_{3}}\]             

  D)  \[{{v}_{1}}<{{v}_{2}}<{{v}_{3}}\]

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• question_answer3) A car designer designed four cars labelled as I, II, III, and IV. The shapes of the cars are shown in given figure. On a test drive, these cars are moving with the same speed on a highway. The tank of each car is filled with the same quantity of fuel.

  In covering equal distances, least fuel is consumed by car

  A)  I                                             

  B)  II                 

  C)  III                                          

  D)  IV

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• question_answer4) Arpita observes that the match stick is not catching fire even when she is rubbing it gently against the comer of the matchbox. The match box had been used many times before also. The possible reason for the given problem is that the

  A) Matchbox has lost its chemical

  B) Matchbox has lost its roughness

  C) Quality of wood used in the match stick is not good

  D) Quality of chemical used in the match stick is not good

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• question_answer5) The picture of four people pushing four heavy boxes of equal weight on a surface in four different situations I, II, III, and IV respectively, is shown in the given figure.

  The maximum and the minimum friction offered by the ground will be for the situations

  A)  I and II                

  B)  III and IV         

  C)  II and III              

  D)  I and IV

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• question_answer6) Atul noticed that the joints of the main door of his house produce a noise every time the gate is opened or closed. He wants to reduce the sound by applying something to the joints. To reduce the noise of the door, Ami must

  A) Drop water in the joints

  B) Spread sand on the joints

  C) Apply grease on the joints

  D) Put chalk powder on the joints

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• question_answer7) A cyclist moving on a road saw a ditch at a distance ahead of him. He firmly applied the brake that caused the cycle to stop almost instantaneously. The applied opposing force that causes the bicycle to come to rest acts between

  A) Hand and Brake

  B) Leg and Paddle

  C) Pads and Tyre

  D) Tyre and Road

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• question_answer8) Amit puts some sand in his hands and tries to grip a glass tumbler. He then repeats the same by putting chalk power, mustard oil, and water on his palms respectively. For a proper grip, Amit should avoid gripping the tumbler with

  A) Water on palms

  B) Sand on palms

  C) Mustard oil on palms

  D) Chalk powder on palms

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