Question

1. Find the force between planet and object when their distance is increased by 3 time and mass of the object is reduced by 2 times. (Assume both are point objects)​

Answer 1

Explanation:

F = G M1 × M2 ÷ R²

= 1/2 M1 × 1/2M2 ÷ 3R²

1/4 M1 ÷ 3R²

for example

F = 6.67×10-¹¹ × 2kg × 3Kg ÷3r²

= 6.67×10-¹¹ × 1/4 × 6kg ÷ 3(2²)

= 6.67×10-¹¹ × 1/4 × 6kg ÷ 3(4)

= 0.83 gravitational force