Q1. Taking g = 10 m/s², the weight of a 5 kg object on Earth is:
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Answer: A. 50 N
W = mg = 5 × 10 = 50 N.
Physics - Gravitation Questions for SSC CGL (with Answers)
10 Physics - Gravitation MCQs from the General Awareness section, with answers and short explanations.
Score: 0 / 0
Q2. Ocean tides on Earth are caused mainly by the gravitational pull of the:
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Answer: B. Moon
Tides are caused mainly by the Moon's gravitational pull (with a smaller contribution from the Sun).
Q3. All bodies dropped from the same height in a vacuum reach the ground:
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Answer: C. At the same time
Without air resistance, all bodies fall with the same acceleration g and land together.
Q4. The acceleration due to gravity on the surface of the Moon is about ____ of that on Earth.
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Answer: D. One-sixth
g on the Moon is about 1/6 of g on Earth.
Q5. If the distance between two masses is doubled, the gravitational force between them becomes:
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Answer: D. One-fourth
F ∝ 1/r², so doubling r makes the force 1/4 of its original value.
Q6. The value of the universal gravitational constant G is approximately:
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Answer: D. 6.67 × 10^-11 N m²/kg²
G ≈ 6.67 × 10^-11 N m² kg⁻², the same everywhere in the universe.
Q7. A person has a mass of 60 kg on Earth. What is his mass on the Moon?
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Answer: C. 60 kg
Mass remains 60 kg everywhere; only weight changes on the Moon.
Q8. At the centre of the Earth, the value of acceleration due to gravity is:
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Answer: C. Zero
At the centre, pulls from all directions cancel, so g = 0.
Q9. The weight of an object is maximum at the:
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Answer: C. Poles of the Earth
g is greatest at the poles because they are closest to Earth's centre, so weight is maximum there.
Q10. The minimum velocity required for an object to escape Earth's gravity (escape velocity) is about:
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Answer: A. 11.2 km/s
Earth's escape velocity is about 11.2 km/s.
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