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question_answer1) A wheelchair is pushed from West to East, as shown in the given figure. After traveling some distance, it takes two left turns. Finally, it takes a right turn and comes to a halt. Before the wheelchair comes to a halt, the direction of force on it is from: (a) West to East (b) East to West (c) North to South (d) South to North
question_answer2) A large box, placed on the ground, has to be shifted up to a wall, as shown in the given figure. Three boys push the box together. They have to apply a large amount of force to move the box. The motion of the box is opposed by the frictional force between the box and the ground. If wheels were present below the box, then they would have to apply (a) More force (b) Same force (c) Less force (d) No force
question_answer3) A small bar magnet is held by the magnetic force of a strong bar magnet fixed on its position on a rough inclined plane, as shown in the given figure. The small bar magnet experiences (a) only magnetic force (b) magnetic and frictional forces (c) gravitational and magnet forces (d) gravitational, magnetic, and frictional forces
question_answer4) A ball is thrown up and attains a maximum height of 19.6 m. Its initial speed was (a) \[9.8m{{s}^{-1}}\] (b) \[44.3m{{s}^{-1}}\] (c) \[19.6\text{ }m{{s}^{-1}}\] (d) \[98\text{ }m{{s}^{-1}}\]
question_answer5) Two iron and wooden balls identical in size are released from the same height in vacuum. The time taken by them to reach the ground are: (a) not equal (b) exactly equal (c) regularly equal (d) zero
question_answer6) The density of air a t normal atmospheric pressure is \[1.293\text{ }kg\text{ }{{m}^{-3}}\]. What would be the density of air at a pressure of 10 atmospheres?
question_answer7) Calculate the equivalent height of water barometer if the pressure recorded by mercury barometer is 76 cm. Density of mercury is \[13600\text{ }kg\text{ }{{m}^{-3}}\]and density of water is\[1000\text{ }kg\text{ }n{{r}^{3}}\].
question_answer8) The pressure at a depth of 13.6 cm in a water beaker is same as the pressure at a depth of 1 cm in another beaker containing an unknown liquid. Identify the unknown liquid.
question_answer9) A volume of a gas enclosed in a cylinder is\[1000c{{m}^{3}}\]. If the pressure on the gas is reduced slowly to of \[{\scriptstyle{}^{1}/{}_{4}}\]the original value, calculate the final volume.
question_answer10) A gas present in a cube of length 1 is shifted to another cube of length 21. What is the pressure of the gas in the 2nd case, if the pressure of the gas in the 1st case is P at the same temperature?
question_answer11) A gas in a sphere of radius 2r is transferred to another sphere of radius r. Find the pressure after transferring if initial pressure is P.
question_answer12) A gas of volume 100 cc. is kept in a vessel at pressure \[{{10}^{4}}\] Pa maintained at temperature of\[{{24}^{o}}C\]. If now the pressure is increased to \[{{10}^{5}}\] Pa, keeping the temperature constant, then the volume of the gas becomes.
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The small bar magnet experiences (a) only magnetic force (b) magnetic and frictional forces (c) gravitational and magnet forces (d) gravitational, magnetic, and frictional forces 