## Newton Laws of Motion Quiz-10

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 stone weighing 1 kg and sliding on ice with a velocity of 2 m/s is stopped by friction in 10 sec.The force of friction (assuming it to be constant) will be
•  -20 N
•  -0.2 N
•  0.2 N
•  20 N
Solution

Q2.Diwali rockets are ejecting 50 g of gases per second at a velocity of〖 400 ms〗^(-1). The accelerating force on the rocket will be
•  22 dyne
•  20N
•  20 dyne
•  100 N
Solution

Q3.  A block moving on a surface with velocity 20 ms-1 comes to rest because of surface friction over a distance of 40 m. taking g=10 ms-2, the coefficient of dynamic friction is
•  0.5
•  0.3
•  0.2
•  0.1
Solution

Q4. A student unable to answer a question on Newton’s law of motion attempts to pull himself up by tugging on his hair. He will not succeed
•  As the force exerted is small
•  The frictional force while gripping, is small
•  Newton’s law of inertia is not applicable to living beings
•  As the force applied is internal to the system
Solution

Q5.A uniform metal chain is placed on a rough table such that one end of it hangs down over the edge of the table. When one-third of its length hangs over the edge, the chain starts sliding. Then, the coefficient of static friction is
•  3/4
•  1/4
•  2/3
•  1/2
Solution

Q6. The mass of a body measured by a physical balance in the lift at rest is found to be m. If the lift is going up with an acceleration a, its mass will be measured as
•  m(1-a/g)
•  m(1+a/g)
• m
•  Zero
Solution

Q7.Two masses m1=5 kg and m2=4.8 kg tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when they are free to move

•  0.2 m/s2
•  9.8 m/s2
•  5 m/s2
•  4.8 m/s2
Solution

Q8.If rope of lift breaks suddenly, the tension exerted by the surface of lift(g=9.8 m/s2)
•  mg
•  m(g+a)
•  m(g-a)
•  Zero
Solution

Q9.A light string passing over a smooth light pulley connects two blocks of masses m1 and m2 (vertically). If the acceleration of the system is (g/8), then the ratio of masses is
•  8 : 1
•  9:7
•  4:3
•  5:3
Solution

Q10. If a body of mass m is carried by a lift moving with an upward acceleration a, then the forces acting on the body are (i) the reaction R on the floor of the lift upwards (ii) the weight mg of the body acting vertically downwards. The equation of motion will be given by
•  R=mg-ma
•  R=mg+ma
•  R=ma-mg
• R=mg×ma
Solution

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