According to the universal law of gravitation, gravitational force (\(F\)) acting between two objects is inversely proportional to the square of the distance (\(r\)) between them, i.e.,
\(๐นโ \frac{1 }{๐^2 }\)
If distance r becomes \(\frac{r}2\), then the gravitational force will be proportional to
\(\frac1{ (\frac๐{2})^2}\) = \(\frac4{๐^2}\)
Hence, if the distance is reduced to half, then the gravitational force becomes four times larger than the previous value.
In Fig. 9.26, A, B, C and D are four points on a circle. AC and BD intersect at a point E such that โ BEC = 130ยฐ and โ ECD = 20ยฐ. Find โ BAC.