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In the above given problem if the lower thread is pulled with a jerk, what happens?

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प्रश्न

In the above given problem if the lower thread is pulled with a jerk, what happens?

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उत्तर

If thread CD is pulled with a jerk then it will break from point C because the force acting at point C is not moving further to point A due to the inertia of the rest of the suspended mass of 2 kg.

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अध्याय 5: Laws of Motion - Exercises [पृष्ठ ३४]

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एनसीईआरटी एक्झांप्लर Physics Exemplar [English] Class 11
अध्याय 5 Laws of Motion
Exercises | Q 5.27 | पृष्ठ ३४

संबंधित प्रश्न

Name the scientist who gave the laws of motion.


State Newton’s first law of motion. Give two examples to illustrate Newton’s first law of motion.


The acceleration of a particle is zero, as measured from an inertial frame of reference. Can we conclude that no force acts on the particle? 


A plumb bob is hung from the ceiling of a train compartment. If the train moves with an acceleration 'a' along a straight horizontal track , the string supporting the bob makes an angle tan−1 (a/g) with the normal to the ceiling. Suppose the train moves on an inclined straight track with uniform velocity. If the angle of incline is tan−1 (a/g), the string again makes the same angle with the normal to the ceiling. Can a person sitting inside the compartment tell by looking at the plumb line whether the train is accelerating on a horizontal straight track or moving on an incline? If yes, how? If not, then suggest a method to do so.


Neglect the effect of rotation of the earth. Suppose the earth suddenly stops attracting objects placed near its surface. A person standing on the surface of the earth will.


In an imaginary atmosphere, the air exerts a small force F on any particle in the direction of the particle's motion. A particle of mass m projected upward takes time t1 in reaching the maximum height and t2 in the return journey to the original point. Then.


'When a hanging carpet is beaten with a stick, the dust particles start coming out of it'. This phenomenon can be best explained by making use of :


A force of 600 dynes acts on a glass ball of mass 200 g for 12 s. If initially, the ball is at rest, find

  1. Final velocity
  2. Distance covered.

Derive the relation between newton and dyne.


What do you mean by inertia of rest?


Name the scientist who first stated the law of inertia.


Differentiate between gravitational mass and inertial mass.


Match the following

Column I Column II
Newton’s I law propulsion of a rocket
Newton’s II law Stable equilibrium of a body
Newton’s III law Law of force
Law of conservation of linear momentum Flying nature of bird

If a 5 N and a 15 N forces are acting opposite to one another. Find the resultant force and the direction of action of the resultant force.


When a bus suddenly takes a tum, the passengers are thrown outwards because of


Newton's first law of motion describes ______.


Block A of weight 100 N rests on a frictionless inclined plane of slope angle 30° (figure). A flexible cord attached to A passes over a frictonless pulley and is connected to block B of weight W. Find the weight W for which the system is in equilibrium.


Match the following.

Column I Column II
a. Newton’s I law propulsion of a rocket
b. Newton’s II law Stable equilibrium of the body
c. Newton’s III law Law of force
d. Law of conservation of Linear momentum Flying nature of bird

When does an object accelerate?


An insect is at the bottom of a hemispherical ditch of radius 1 m. It crawls up the ditch but starts slipping after it is at height h from the bottom. If the coefficient of friction between the ground and the insect is 0.75, then h is ______. (g = 10 ms−2)


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