Newton Laws of Motion Quiz-9

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. A block of mass 4 kg is suspended through two light spring balances A and B. Then A and B, Then A and B will read respectively

  •  4 kg and zero kg
  •  Zero kg and 4 kg
  •  4 kg and 4 kg
  •  2 kg and 2 kg

Q2.The coefficient of static friction, μ_s, between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless

  •  2.0 kg
  •  4.0 kg
  •  0.2 kg
  •  0.4 kg

Q3.  A horizontal force F is applied on a block mass m placed on a rough inclined plane of inclination θ. The normal reaction N is

  •  mg cos⁡θ
  •  mg sin⁡θ
  •  mg cos⁡θ-F cos⁡θ
  •  mg cos⁡θ+F sin⁡θ

Q4. A block can slide on a smooth inclined plane of inclination θ kept on the floor of a lift. When the lift is descending with a retardation a, the acceleration of the block relative to the incline is
  •  (g+a) sin⁡θ
  •  (g-a)
  •  g sin⁡θ
  •  (g-a) sin⁡θ

Q5.Two masses m1 and m2 (m1>m2) are connected by massless flexible and inextensible string passed over massless and frictionless pulley. The acceleration of centre of mass is
  •  ((m1-m2)/(m1+m2 ))2 g
  •  (m1-m2)/(m1+m2 ) g
  •  (m1+m2)/(m1-m2 ) g
  •  zero

Q6. Block A of mass 2 kg is placed over a block B of mass 8 kg. The combination is placed on a rough horizontal surface. If g=10ms-2, coefficient of friction between B and floor =0.5, coefficient of friction between A and B = 0.4 and a horizontal force of 10 N is applied on 8 kg block, then the force of friction between A and B is

  •  100 N
  •  50 N
  • 40 N
  •  None of These

Q7.A flat plate moves normally with a speed v1 towards a horizontal jet of water of uniform area of cross-section. The jet discharges water at the rate of volume V per second at a speed of v2. The density of water is ρ. Assume that water splashes along the surface of the plate at right angles to the original motion. The magnitude of the force acting on the plate due to the jet of water is
  •  ρVv1
  •  ρV(v1+v2)
  •  ρV/(v1+v2 ) v12
  •  ρ[V/v2 ] (v1+v2 )2

Q8.The rate of the mass of the gas emitted from rear of a rocket is initially 0.1kgs-1. If the speed of the gas relative to the rocket is 50 ms-1 and mass of the rocket is 2 kg, then the acceleration of the rocket (g=9.8 m/s2)
  •  5
  •  5.2
  •  2.5
  •  25

Q9.A cricket ball of mass 0.25 kg with speed 10 m/s collides with a bat and returns with same speed with in 0.01 s. The force acted on bat is
  •  25 N
  •  50 N
  •  250 N
  •  500 N

Q10. Two blocks of masses 1 kg and 2 kg are connected by a metal wire going over a smooth pulley as shown in figure. The breaking stress of the metal is 2×109 Nm-2. What should be the minimum radius of the wire used if it is not to break?

  •  4.6×10-5 m
  •  4.6×10-6 m
  •  2.5×10-6 m
  • 2.5×10-5 m
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Newton Laws of Motion Quiz-9
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