Find the initial speed of an object of mass 2kg which is fired vertically upward from the surface of earth and reaches up to height equal to radius of earth.

Question

Find the initial speed of an object of mass 2kg which is fired vertically upward from the surface of earth and reaches up to height equal to radius of earth. (A) 4km/s (B) 2√3km/s (C) 16km/s (D) 8km/s

Tardigrade Admin · Accepted Answer

Use (1/2)mv2=(m g h/[1 + (h)R])

Q. Find the initial speed of an object of mass $2 k g$ which is fired vertically upward from the surface of earth and reaches up to height equal to radius of earth.

$4 km / s$

$23 km / s$

$16 km / s$

$8 km / s$

Use $\frac{1}{2} m v^{2} = \frac{m g h}{[ 1 + \frac{h}{R} ]}$

Q. Find the initial speed of an object of mass 2kg which is fired vertically upward from the surface of earth and reaches up to height equal to radius of earth.

4km/s

23​km/s

16km/s

8km/s