Question

Two bodies of masses 10 kg and 100 kg are separated by a distance of 2m. The gravitational potential at the mid-point of the line joining the two bodies is :

• A. –7.3 × 10^–7 J/kg
• B. –7.3 × 10^–8 J/kg
• C. –7.3 × 10^–9 J/kg
• D. –7.3 × 10^–6 J/kg

Answer 1

Answer: (C)

–7.3 × 10^–9 J/kg

Answer 2

Gravitational potential

= – – = –110 G

= – 110 × 6.67 × 10^–11 J kg^–1

= – 7.3 × 10^–9 J/kg