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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? - Physics

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प्रश्न

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? 

टिप्पणी लिखिए

उत्तर

No. The acceleration of the particle can also be zero if the vector sum of all the forces is zero, i.e. no net force acts on the particle.

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अध्याय 5: Newton's Laws of Motion - short answers [पृष्ठ ७७]

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एचसी वर्मा Concepts of Physics Vol. 1 [English] Class 11 and 12
अध्याय 5 Newton's Laws of Motion
short answers | Q 9 | पृष्ठ ७७

संबंधित प्रश्न

Give the magnitude and direction of the net force acting on a drop of rain falling down with a constant speed.


If the speed of the stone is increased beyond the maximum permissible value, and the string breaks suddenly, which of the following correctly describes the trajectory of the stone after the string breaks?


A moving bicycle comes to rest after sometime if we stop pedalling it. But Newton’s first law of motion says that a moving body should continue to move for ever, unless some external force acts on it. How do you explain the bicycle case ?


Find the acceleration produced by a force of 5 N acting on a mass of 10 kg.


It is sometimes heard that the inertial frame of reference is only an ideal concept and no such inertial frame actually exists. Comment.


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.


Three rigid rods are joined to form an equilateral triangle ABC of side 1 m. Three particles carrying charges 20 μC each are attached to the vertices of the triangle. The whole system is at rest in an inertial frame. The magnitude of the resultant force on the charged particle at A is.


A reference frame attached to the earth
(a) is an inertial frame by definition
(b) cannot be an inertial frame because the earth is revolving around the sun
(c) is an inertial frame because Newton's laws are applicable in this frame
(d) cannot be an inertial frame because the earth is rotating about its axis.


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(a) going up and slowing down
(b) going up and speeding up
(c) going down and slowing down
(d) going down and speeding up


When a train starts, the head of a standing passenger seems to be pushed backward. Analyse the situation from the ground frame. Does it really go backward? Coming back to the train frame, how do you explain the backward movement of the head on the basis of Newton's laws?


State and explain the law of inertia (or Newton's first law of motion).


How does Newton's second law of motion differ from the first law of motion?


Name the different kinds of inertia an object can possess. Give an example of each.


Define one Newton.


What do you mean by inertia of rest?


Give two examples of the following:
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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.


The masses of 10 kg and 20 kg, respectively, are connected by massless spring as shown in the figure. A force of 200 N acts on the 20 kg mass. At the instant shown, the 10 kg mass has acceleration of 12 m/s2. What is the acceleration of 20 kg mass?

(g = 10 m/s2)

 


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

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