Misconceptions about PE

Q. The potential energy of an object of mass m moving in xy plane in a conservative field is given by ∪=ax+by, Where x and y are position coordinates of the object.Find magnitude of its acceleratio

Q.

What is the relation between the force function and potential energy function?

1. 

2. 

3. 

4. 

Q. The potential energy of a system increases if work is done(1) Upon the system by a conservative force(2) Upon the system by a non conservative force(3) By the system against a conservative force(4) By the system against a non conservative force

Q. 20. A particle is released from rest at origin. It moves { under the influence of potential field U=x^2-3x . { Its kinetic energy at x=2 is { (1) 2J{ (2) 1.5J{ (3) 1J (4) Zero

Q. Energy stored in spring $A=20\text{J}$, then energy stored in spring $B$ is (under same extension of the spring)

1. $20\text{J}$
2. $30\text{J}$
3. $40\text{J}$
4. $50\text{J}$

Q.

what is the relation b/w potential energy and force

Q. Find the ratio of the magnitude of the electric force to the gravitational force acting between two protons.

Q.

_________ of a two particle system depends only on the seperation between the two particles.

1. Kinetic Energy

2. Total Mechanical Energy

3. Potential Energy

4. Total Energy

Q. There is an object of mass 'm' at a height 'h' from the ground. When you say that the potential energy is 'mgh', which of the following is true

1. The potential energy at ground level is taken as zero
2. Potential energy at infinity is taken as zero
3. Potential energy is stored in the object
4. 'mgh' is the potential energy of earth-body system

Q. Energy stored in spring $A=20\text{J}$, then energy stored in spring $B$ is (under same extension of the spring)

1. $20\text{J}$
2. $30\text{J}$
3. $40\text{J}$
4. $50\text{J}$