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Grade 12Mechanics

a force produces an acceleraion of 1,1/2,1/,1/4..........all in m/s2,when combined separately to n bodies to form single one,then the acceleration of the system will be ,if same force is taken into account
dear arun sir..for first time i think by mistake u have gone wrong..kindly correct ….thanku..

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8 Years agoGrade 12
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ApprovedApproved Tutor Answer1 Year ago

To tackle the question about how a force affects the acceleration of a system when combined with multiple bodies, let's break it down step by step. The scenario involves a force producing different accelerations when applied to individual bodies, and we want to determine the overall acceleration when these bodies are combined into a single system.

Understanding the Problem

We have a force that produces accelerations of 1 m/s², 1.5 m/s², 1 m/s², and 0.25 m/s² for different bodies. When these bodies are combined, we need to find the acceleration of the entire system under the same force. The key here is to remember that acceleration is directly related to the net force acting on an object and inversely related to its mass, as described by Newton's second law of motion: F = ma.

Calculating Individual Masses

First, let's denote the force applied as F. For each body, we can express the mass using the formula:

  • For the first body: m1 = F / 1
  • For the second body: m2 = F / 1.5
  • For the third body: m3 = F / 1
  • For the fourth body: m4 = F / 0.25

Finding Total Mass

Next, we need to find the total mass of the system when these bodies are combined:

  • Total mass, M = m1 + m2 + m3 + m4

Substituting the expressions for each mass, we get:

M = (F / 1) + (F / 1.5) + (F / 1) + (F / 0.25)

Combining the Masses

To simplify this, we can factor out F:

M = F * (1 + 2/3 + 1 + 4)

Calculating the terms inside the parentheses:

  • 1 + 2/3 = 5/3
  • 5/3 + 1 = 8/3
  • 8/3 + 4 = 20/3

Thus, the total mass becomes:

M = F * (20/3)

Finding the Acceleration of the Combined System

Now, we can find the acceleration of the entire system using the same force F:

A = F / M

Substituting for M gives:

A = F / (F * (20/3))

This simplifies to:

A = 3/20 m/s²

Final Thoughts

So, when the bodies are combined into a single system and the same force is applied, the acceleration of the system will be 3/20 m/s². This example illustrates how combining multiple objects with different accelerations under the same force results in a new acceleration that depends on the total mass of the system. If you have any further questions or need clarification on any part of this explanation, feel free to ask!