Gravitational Fields Flashcards
What is the formula for gravitational potential energy (GPE)?
GPE = -GMm/r
In the formula GPE = mgh, what does ‘m’ stand for?
‘m’ stands for mass.
True or False: Gravitational potential energy increases as height increases.
True
What does ‘g’ represent in the equation GPE = mgh?
‘g’ represents the acceleration due to gravity.
Fill in the blank: The unit of gravitational potential energy is __________.
Joules (J)
What is the value of ‘g’ on the surface of the Earth?
Approximately 9.81 m/s²
What happens to gravitational potential energy when an object falls?
It decreases.
Define a gravitational field.
A gravitational field is a region of space surrounding a mass where another mass experiences a force of attraction.
What is the equation for the gravitational field strength (g)?
g = F/m=Gm/r²
In the equation g = F/m, what does ‘F’ represent?
‘F’ represents the gravitational force.
True or False: Gravitational field strength is a scalar quantity.
False
What is the relationship between gravitational field strength and distance from the mass?
Gravitational field strength decreases with increasing distance from the mass.
Fill in the blank: The gravitational field strength at a distance ‘r’ from a mass ‘M’ is given by __________.
g = GM/r²
What does ‘G’ stand for in the equation g = GM/r²?
‘G’ stands for the universal gravitational constant.
What is the value of the universal gravitational constant (G)?
6.67× 10⁻¹¹ N(m/kg)²
If the mass of a planet increases, what happens to its gravitational field strength?
It increases.
What is the effect of doubling the height on the gravitational potential energy of an object?
It doubles the gravitational potential energy.
True or False: An object in free fall has zero gravitational potential energy.
False
What happens to gravitational potential energy when an object is lifted vertically?
It increases.
What is the formula for force due to gravity?
F=GMm/r²
What is Newton’s law of gravitation?
The force due to gravity between two masses in a gravitational field is proportional to the product of the masses and inversely proportional to the square of the separation.
Define gravitational potential
The energy required per unit mass to move an object from infinity to a point in a gravitational field.
Define gravitational potential energy
The energy requires to move a mass from infinity to a point in a gravitational field
What is the equation for gravitational potential?
Vg=-GM/r
