Gravitation MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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The force of gravity between two objects with masses m₁ and m₂ separated by a distance r is:
A. G m₁ m₂ / r²
B. G m₁ m₂ / r
C. G m₁ m₂
D. G / (m₁ m₂)
Answer: G m₁ m₂ / r²
The escape velocity of an object from a celestial body is determined by its:
A. Mass and radius
B. Density and temperature
C. Temperature and pressure
D. Mass and surface area
Answer: Mass and radius
The gravitational acceleration on the surface of the Earth is approximately:
A. 9.81 m/s²
B. 8.9 m/s²
C. 10 m/s²
D. 11.2 m/s²
Answer: 9.81 m/s²
The gravitational constant G has the unit of:
A. N·m²/kg²
B. N·m/kg
C. m²/kg
D. N·kg²/m²
Answer: N·m²/kg²
The value of gravitational constant G is used to:
A. Calculate gravitational force between two masses
B. Determine the speed of light
C. Measure electrical forces
D. Find magnetic forces
Answer: Calculate gravitational force between two masses
The gravitational potential energy of an object at height h is:
A. mgh
B. Gm₁m₂ / r
C. 1/2 mv²
D. Fh
Answer: mgh
The gravitational field strength on the surface of the Earth is approximately:
A. 9.81 m/s²
B. 8.9 m/s²
C. 10 m/s²
D. 11.2 m/s²
Answer: 9.81 m/s²
The gravitational field strength at a height h above the Earth’s surface is given by:
A. g / (1 + h/R)²
B. g / (1 – h/R)²
C. g * (1 + h/R)
D. g * (1 – h/R)
Answer: g / (1 + h/R)²
The gravitational force between two objects with masses m₁ and m₂ separated by a distance r is:
A. G m₁ m₂ / r²
B. G m₁ m₂ / r
C. G m₁ m₂
D. G / (m₁ m₂)
Answer: G m₁ m₂ / r²