Free Law of Universal Gravitation MCQs with Answers
21 Law of Universal Gravitation MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Every two masses attract each other with a force proportional to the product of their masses and inversely proportional to the square of their separation, expressed as F = Gm₁m₂/r². Questions also involve the gravitational constant, vector direction, superposition of gravitational forces, and the distinction between gravitational force and gravitational field strength.
Last updated
21 questions · page 3 of 3
21. The absolute potential energy of a spaceship on the surface of the earth is:
- A. GmMe/Re^2
- B. GMe/Re
- C. GmMe/2Re
- D. -GMe/Re
Explanation: The absolute potential energy (U) of an object, such as a spaceship, on the surface of the Earth can be calculated using the formula:U = -G * (m * M_E) / r_Ewhere:- G is the gravitational constant- m is the mass of the spaceship- M_E is the mass of the Earth- r_E is the radius of the EarthThis formula represents the gravitational potential energy of the spaceship due to its position on the Earth's surface. The negative sign indicates that the potential energy is lower on the surface than at infinity
Correct answer: -GMe/Re