Universal Law of GravitationPractice Questions & MCQs
Practice Universal Law of Gravitation questions from Gravitation (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Universal Law of GravitationQuiz - Solve & Score
Q1. Two cargo ships float side by side in a calm harbour. If their masses are 1000 kg and 2000 kg and their centres are 5 m apart, what gravitational force does each exert on the other?
- A.1.33e-4 N
- B.8e-9 N
- C.2.67e-5 N
- D.5.34e-6 N
Answer: D. 5.34e-6 N
By the universal law of gravitation F = G*m1*m2/r^2 = (6.67e-11)*(1000)*(2000)/(5)^2 = 5.34e-6 N.
Q2. Two cargo ships float side by side in a calm harbour, with masses 500 kg and 500 kg separated by 2 m. What is the force of gravity between them?
- A.8.34e-6 N
- B.4.17e-6 N
- C.1.67e-8 N
- D.1.67e-5 N
Answer: B. 4.17e-6 N
By the universal law of gravitation F = G*m1*m2/r^2 = (6.67e-11)*(500)*(500)/(2)^2 = 4.17e-6 N.
Q3. Two cargo ships float side by side in a calm harbour. Given masses of 10000 kg and 10000 kg and a centre-to-centre gap of 10 m, find the mutual gravitational pull?
- A.6.67e-4 N
- B.1.33e-8 N
- C.6.67e-3 N
- D.6.67e-5 N
Answer: D. 6.67e-5 N
By the universal law of gravitation F = G*m1*m2/r^2 = (6.67e-11)*(10000)*(10000)/(10)^2 = 6.67e-5 N.
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