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Consider the following statements:
1. There is no net moment on a body which is in equilibrium.
2. The momentum of a body is always conserved.
3. The kinetic energy of an object is always conserved.
Q. Which of the statements given above is/are correct?
  • a)
    1, 2 and 3
  • b)
    2 and 3 only
  • c)
    1 and 2 only
  • d)
    1 only
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider the following statements:1. There is no net moment on a body ...
  • Statement 1- For a body to be in equilibrium net force on the object must be zero which results in zero net moment.
  • Statement 2- According to Newton’s First Law If a body continues in its state of rest or of uniform motion unless acted upon by an external force. So linear momentum of a body on which no external force acts is conserved.
  • Statement 3- In inelastic collision Kinetic energy is transfer from one body to other so kinetic energy always do not remain conserve.So only statement 1 and 2 are correct.
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Most Upvoted Answer
Consider the following statements:1. There is no net moment on a body ...

Explanation:

1. Statement 1: There is no net moment on a body which is in equilibrium.
- This statement is correct according to the principle of rotational equilibrium. When a body is in equilibrium, the net torque acting on it is zero, which means there is no net moment.

2. Statement 2: The momentum of a body is always conserved.
- This statement is incorrect. The momentum of a body is only conserved if there is no external force acting on it. In the presence of external forces, momentum can change due to acceleration.

3. Statement 3: The kinetic energy of an object is always conserved.
- This statement is incorrect. Kinetic energy is not always conserved because it can be transformed into other forms of energy like potential energy or thermal energy. In situations involving non-conservative forces, kinetic energy may not be conserved.

Therefore, the correct answer is option C as only statements 1 and 2 are correct.
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Consider the following statements:1. There is no net moment on a body which is in equilibrium.2. The momentum of a body is always conserved.3. The kinetic energy of an object is always conserved.Q. Which of the statements given above is/are correct?a)1, 2 and 3b)2 and 3 onlyc)1 and 2 onlyd)1 onlyCorrect answer is option 'C'. Can you explain this answer?
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