Question

The maximum and minimum distances of comet from the Sun are 1.6 × 10¹² m and 8.0 × 10¹⁰ m respectively If the speed of the comet at the nearest point is 6 × 10⁴ ms^–1 , the speed at the farthest point is :

(1) 3.0 × 10³ m/s (2) 4.5 × 10³ m/s (3) 1.5 × 10³ m/s (4) 6.0 × 10³ m/s

Answer 1

The correct answer is option A) 3.0×10³ m/s 

Explanation::

$L=m{v}_1{r}_1=m{v}_2{r}_2$

$V_2=\frac{v_1{r}_1}{r_2}$ 

$=v_1\frac{8\times {10}^{10}}{160\times {10}^{10}}$

$=\frac{6\times {10}^4}{20}$

$=3000m/s$