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PHXI06:WORK ENERGY AND POWER

355403 Negative of work done by the conservative forces on a system is equal to :

1 The change in kinetic energy of the system

2 The change in potential energy of the system

3 The change in total mechanical energy of the system

4 None of these

PHXI06:WORK ENERGY AND POWER

355404 Work done by a conservative force

1 Never depends on path

2 May depend on path

3 Is not related to potential energy

4 None of these

PHXI06:WORK ENERGY AND POWER

355405 If $W_{1}, W_{2}$ and $W_{3}$ represent the work done in moving a particle from $A$ to $B$ along three different paths 1,2 and 3 respectively in the gravitational field of a point mass $m$ . Find the correct relation between $W_{1}, W_{2}$ and $W_{3}$ .
supporting img

1

W_{1} = W_{2} = W_{3}

2

W_{1} < W_{2} < W_{3}

3

W_{1} > W_{2} > W_{3}

4

W_{1} < W_{2} > W_{3}

PHXI06:WORK ENERGY AND POWER

355406 Statement A :
In the absence of nonconservative forces total mechanical energy is conserved.
Statement B :
Total energy of an isolated system remains constant.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

PHXI06:WORK ENERGY AND POWER

355407 Assertion :
In case of conservative forces, the work done during a round trip is always zero.
Reason :
No force is required to move a body in its round trip in any situation.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

For conservative force $F (r)$ we have
$Δ U = W = \vec{F} (r) \cdot Δ \vec{r}$
$\Rightarrow W = F (r) (0) = 0$
$(∵$ in round trip, $Δ r = 0)$
So correct option is (3)

PHXI06:WORK ENERGY AND POWER

355403 Negative of work done by the conservative forces on a system is equal to :

1 The change in kinetic energy of the system

2 The change in potential energy of the system

3 The change in total mechanical energy of the system

4 None of these

PHXI06:WORK ENERGY AND POWER

355404 Work done by a conservative force

1 Never depends on path

2 May depend on path

3 Is not related to potential energy

4 None of these

PHXI06:WORK ENERGY AND POWER

355405 If $W_{1}, W_{2}$ and $W_{3}$ represent the work done in moving a particle from $A$ to $B$ along three different paths 1,2 and 3 respectively in the gravitational field of a point mass $m$ . Find the correct relation between $W_{1}, W_{2}$ and $W_{3}$ .
supporting img

1

W_{1} = W_{2} = W_{3}

2

W_{1} < W_{2} < W_{3}

3

W_{1} > W_{2} > W_{3}

4

W_{1} < W_{2} > W_{3}

PHXI06:WORK ENERGY AND POWER

355406 Statement A :
In the absence of nonconservative forces total mechanical energy is conserved.
Statement B :
Total energy of an isolated system remains constant.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

PHXI06:WORK ENERGY AND POWER

355407 Assertion :
In case of conservative forces, the work done during a round trip is always zero.
Reason :
No force is required to move a body in its round trip in any situation.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

For conservative force $F (r)$ we have
$Δ U = W = \vec{F} (r) \cdot Δ \vec{r}$
$\Rightarrow W = F (r) (0) = 0$
$(∵$ in round trip, $Δ r = 0)$
So correct option is (3)

PHXI06:WORK ENERGY AND POWER

355403 Negative of work done by the conservative forces on a system is equal to :

1 The change in kinetic energy of the system

2 The change in potential energy of the system

3 The change in total mechanical energy of the system

4 None of these

PHXI06:WORK ENERGY AND POWER

355404 Work done by a conservative force

1 Never depends on path

2 May depend on path

3 Is not related to potential energy

4 None of these

PHXI06:WORK ENERGY AND POWER

355405 If $W_{1}, W_{2}$ and $W_{3}$ represent the work done in moving a particle from $A$ to $B$ along three different paths 1,2 and 3 respectively in the gravitational field of a point mass $m$ . Find the correct relation between $W_{1}, W_{2}$ and $W_{3}$ .
supporting img

1

W_{1} = W_{2} = W_{3}

2

W_{1} < W_{2} < W_{3}

3

W_{1} > W_{2} > W_{3}

4

W_{1} < W_{2} > W_{3}

PHXI06:WORK ENERGY AND POWER

355406 Statement A :
In the absence of nonconservative forces total mechanical energy is conserved.
Statement B :
Total energy of an isolated system remains constant.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

PHXI06:WORK ENERGY AND POWER

355407 Assertion :
In case of conservative forces, the work done during a round trip is always zero.
Reason :
No force is required to move a body in its round trip in any situation.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

For conservative force $F (r)$ we have
$Δ U = W = \vec{F} (r) \cdot Δ \vec{r}$
$\Rightarrow W = F (r) (0) = 0$
$(∵$ in round trip, $Δ r = 0)$
So correct option is (3)

PHXI06:WORK ENERGY AND POWER

355403 Negative of work done by the conservative forces on a system is equal to :

1 The change in kinetic energy of the system

2 The change in potential energy of the system

3 The change in total mechanical energy of the system

4 None of these

PHXI06:WORK ENERGY AND POWER

355404 Work done by a conservative force

1 Never depends on path

2 May depend on path

3 Is not related to potential energy

4 None of these

PHXI06:WORK ENERGY AND POWER

355405 If $W_{1}, W_{2}$ and $W_{3}$ represent the work done in moving a particle from $A$ to $B$ along three different paths 1,2 and 3 respectively in the gravitational field of a point mass $m$ . Find the correct relation between $W_{1}, W_{2}$ and $W_{3}$ .
supporting img

1

W_{1} = W_{2} = W_{3}

2

W_{1} < W_{2} < W_{3}

3

W_{1} > W_{2} > W_{3}

4

W_{1} < W_{2} > W_{3}

PHXI06:WORK ENERGY AND POWER

355406 Statement A :
In the absence of nonconservative forces total mechanical energy is conserved.
Statement B :
Total energy of an isolated system remains constant.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

PHXI06:WORK ENERGY AND POWER

355407 Assertion :
In case of conservative forces, the work done during a round trip is always zero.
Reason :
No force is required to move a body in its round trip in any situation.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

For conservative force $F (r)$ we have
$Δ U = W = \vec{F} (r) \cdot Δ \vec{r}$
$\Rightarrow W = F (r) (0) = 0$
$(∵$ in round trip, $Δ r = 0)$
So correct option is (3)

PHXI06:WORK ENERGY AND POWER

355403 Negative of work done by the conservative forces on a system is equal to :

1 The change in kinetic energy of the system

2 The change in potential energy of the system

3 The change in total mechanical energy of the system

4 None of these

PHXI06:WORK ENERGY AND POWER

355404 Work done by a conservative force

1 Never depends on path

2 May depend on path

3 Is not related to potential energy

4 None of these

PHXI06:WORK ENERGY AND POWER

355405 If $W_{1}, W_{2}$ and $W_{3}$ represent the work done in moving a particle from $A$ to $B$ along three different paths 1,2 and 3 respectively in the gravitational field of a point mass $m$ . Find the correct relation between $W_{1}, W_{2}$ and $W_{3}$ .
supporting img

1

W_{1} = W_{2} = W_{3}

2

W_{1} < W_{2} < W_{3}

3

W_{1} > W_{2} > W_{3}

4

W_{1} < W_{2} > W_{3}

PHXI06:WORK ENERGY AND POWER

355406 Statement A :
In the absence of nonconservative forces total mechanical energy is conserved.
Statement B :
Total energy of an isolated system remains constant.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

PHXI06:WORK ENERGY AND POWER

355407 Assertion :
In case of conservative forces, the work done during a round trip is always zero.
Reason :
No force is required to move a body in its round trip in any situation.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

For conservative force $F (r)$ we have
$Δ U = W = \vec{F} (r) \cdot Δ \vec{r}$
$\Rightarrow W = F (r) (0) = 0$
$(∵$ in round trip, $Δ r = 0)$
So correct option is (3)

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