## Newton Laws of Motion Quiz-7

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background.

Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.

Q1. Force of 4 N is applied on a body of mass 20 kg. The work done in 3rd second is
•  2J
•  4J
•  16J
•  1.2 J
Solution

Q2.A body of weight 2 kg is suspended as shown in figure. The tension T1 in the horizontal string (in kg-wt) is

•  2/√3
•  √3/2
•  2/√3
•  2
Solution

Q3.  The ratio of the weight of a man in a stationary lift and when it is moving downward with uniform acceleration ‘a’ is 3:2,. The value of ‘a’ is
•  3/2 g
•  g/3
•  2g/3
•  g
Solution

Q4. In figure a block of weight 10 N is shown resting on a horizontal surface. The coefficient of static friction between the block and surface is Î¼s=0.4. A force of 3.5 N will keep the block in uniform motion, once it has been in motion. A horizontal force of 3 N is applied to the block. The block will there

•  Move over the surface with a constant velocity
•  Moves having accelerated motion over the surface
•  Not move
•  First move with a constant velocity for sometime and then will have accelerated motion
Solution

Q5.A block rests on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10 N, the mass of the block
•  2.0
•  4.0
•  1.6
•  2.5
Solution

Q6. A particle moves in the xy- plane under the action of a force F such that the components of its linear momentum pat any time t are px=2cos⁡t,py=2sin⁡t. The angle between F and pat time t is
•  90°
•
• 180°
•  30°
Solution

Q7.A car is moving along a straight horizontal road with a speed v0. If the coefficient of friction between the tyres and the road is Î¼, the shortest distance in which the car can be stopped is
•  (v02)/2Î¼g
•  v0/Î¼g
•  (v0/Î¼g)^2
•  v0/Î¼
Solution

Q8.When the speed of a moving body is doubled
•  Its acceleration is doubled
•  Its momentum is doubled
•  Its Kinetic energy is doubled
•  Its potential is doubled
Solution

Q9.A block of mass m lying on a rough horizontal plane is acted upon by a horizontal force P and another force Q inclined at an angle Î¸ to the vertical. The block will remain in equilibrium, if the coefficient of friction between it and the surface is

•  ((P+Q sin⁡Î¸))/((mg+Q cos⁡Î¸))
•  ((P cos⁡Î¸+Q))/((mg-Q sin⁡Î¸))
•  ((P+Q cos⁡Î¸))/((mg+Q sin⁡Î¸))
•  ((P sin⁡Î¸-Q))/((mg-Q cos⁡Î¸))
Solution

Q10. A solid sphere of mass 2 kg is resting inside a cube as shown in the figure. The cube is moving with a velocity v=(5ti+2tj)m/s. Here t is the time in second. All surface are smooth. The sphere is at rest with respect to the cube. What is the total force exerted by the sphere on the cube. (Take g=10 m/s2)

•  √29 N
•  29 N
•  26 N
• √89 N
Solution

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