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Class 9 Science — Chapter 9: Gravitation
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 9 Science, Chapter 9 (Gravitation). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
The universal gravitational constant G has the value approximately:
A.6.67 × 10⁻¹¹ N·m²/kg²✓ correct
B.9.8 m/s²
C.3 × 10⁸ m/s
D.1.6 × 10⁻¹⁹ C
Why
G ≈ 6.674 × 10⁻¹¹ N·m²/kg².
Q2Medium
Newton's universal law of gravitation: F =
A.G m₁ m₂ / r
B.G m₁ m₂ / r²✓ correct
C.G (m₁ + m₂) / r²
D.G m₁ m₂ × r²
Why
F = G m₁ m₂ / r² (inverse-square).
Q3Hard
On the Moon, where g ≈ 1.6 m/s², a 60 kg person weighs:
A.60 N
B.96 N✓ correct
C.588 N
D.600 N
Why
W = mg = 60 × 1.6 = 96 N.
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