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WorksheetsPotential Energy and Energy Conservation
Total questions: 10
Worksheet time: 5mins
Why is gravity considered a conservative force?
Because it depends on the speed of the object
Because the work done depends only on the initial and final positions
Because it always acts upward
Because it changes with the path taken
What happen when a spring is compressed, like in a click pen?
The spring loses all its energy
The spring stops working
The spring changes its mass
The spring stores energy that can be released later
Which of the following is an example of a non-conservative force?
Gravity acting on a falling object
Elastic force in a stretched spring
Friction slowing down a moving box
Magnetic force on a moving charge
At which point on a potential energy graph is the particle in unstable equilibrium?
At a minimum point of U(x)
At a maximum point of U(x)
Where U(x) = 0
Where the slope of U(x) is largest
A particle is in stable equilibrium when it is located at:
A maximum of the potential energy graph
A point where force is maximum
A minimum of the potential energy graph
A point where potential energy is zero
The relationship between force F(x) and potential energy U(x) is:
What is the physical meaning of the negative sign in the relationship between force and potential energy?
Potential energy is always negative
Force pushes the system toward lower potential energy
To make the force magnitude larger
Because it is a non-conservative force
In three dimensions, the vector force F is equal to:
When calculating a partial derivative (e.g., ∂U/∂x), what happens to y and z?
They are added to the result
They are set to zero
They are assumed to be constant
They are squared
If U(x)=C/x, what is the x-component of force?
−C/x
C/x
−C/x^2
C/x^2
