The potential energy U of a system is given by U= A - Bx2 (where x is the position of its particle and A, B are constants). The magnitude of the force acting on the particle is:

1. Constant

2. Proportional to x

3. Proportional to x2

4. Proportional to 1x

Subtopic:  Potential Energy: Relation with Force |
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The potential energy of a particle varies with distance r as shown in the graph. The force acting on the particle is equal to zero at:

                                

1. P

2. S

3. Both Q and R

4.  Both P and S

Subtopic:  Potential Energy: Relation with Force |
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A particle is moving such that the potential energy U varies with position in metres as U = (4x2 - 2x + 50) J. The particle will be in equilibrium at:

1. x = 25 cm

2.  x = 2.5 cm

3.  x = 25 m

4.  x = 2.5 m

Subtopic:  Potential Energy: Relation with Force |
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The potential energy of a particle in a force field is U=Ar2-Br where A and B are positive constants and r is the distance of the particle from the center of the field. For stable equilibrium, the distance of the particle is:

1. B/A

2. B/2A

3. 2A/B

4. A/B

Subtopic:  Potential Energy: Relation with Force |
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Potential energy (U) related to coordinates is given by U = 3(x + y). Work done by the conservative force when the particle is going from (0, 0), (2, 3) is:
1.  15 J
2.  -15 J
3.  12 J
4.  10 J

Subtopic:  Potential Energy: Relation with Force |
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The potential energy of a particle of mass m varies as the magnitude of the U=ax2+by. The magnitude of the acceleration of the particle at (0, 3) is: (symbols have their usual meaning)

1.  bm

2.  3bm

3.  bm

4.  Zero

Subtopic:  Potential Energy: Relation with Force |
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The figure shows the potential energy function U(x) for a system in which a particle is in a one-dimensional motion. What is the direction of the force when the particle is in region AB? (symbols have their usual meanings)

                        

1.  The positive direction of x

2.  The negative direction of X

3.  Force is zero, so direction not defined

4.  The negative direction of y

Subtopic:  Potential Energy: Relation with Force |
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The potential energy of a particle of mass 1 kg free to move along the X-axis is given by Ux = 3x2 - 4x +6 J. The force acting on the particle at x = 0 will be:

1.  2i^ N

2.  -4i^ N

3.  5i^ N

4.  4i^ N

Subtopic:  Potential Energy: Relation with Force |
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A particle of mass 'm' is moving in a horizontal circle of radius 'r' under a centripetal force equal to –K/r2, where K is a constant. The total energy of the particle will be:

1. K2r

2. K2r

3. Kr

4. Kr

Subtopic:  Potential Energy: Relation with Force |
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The given diagram represents the potential energy curve of a particle in a field. The particle will be in equilibrium at which position(s):

1. B and D

2. A and C

3. A, B, and C

4. A, B, C, and D

Subtopic:  Potential Energy: Relation with Force |
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