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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? 

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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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पाठ 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
पाठ 5 Newton's Laws of Motion
short answers | Q 9 | पृष्ठ ७७

संबंधित प्रश्‍न

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


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 ?


Is it possible for a particle to describe a curved path if no force acts on it? Does your answer depend on the frame of reference chosen to view the particle?


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


A block of mass 2 kg placed on a long frictionless horizontal table is pulled horizontally by a constant force F. It is found to move 10 m in the first seconds. Find the magnitude of F.


An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a frictionless horizontal table. The force required to keep this object moving with the same velocity is :


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.

What do you mean by inertia of rest?


Give two examples of the following:
Inertia of motion


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 ______.


A car of mass m starts from rest and acquires a velocity along east `v = vhati (v > 0)` in two seconds. Assuming the car moves with uniform acceleration, the force exerted on the car is ______.


A mass of 2 kg is suspended with thread AB (Figure). Thread CD of the same type is attached to the other end of 2 kg mass. Lower thread is pulled gradually, harder and harder in the downward directon so as to apply force on AB. Which of the threads will break and why?


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


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

How is force defined according to Newton’s First Law?


What does inertia measure in an object?


When does an object accelerate?


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