Question

A firefighter drops from a window into a net. if the window is 34 meters above the net, the speed with which firefighter hit the net:

• A. 18 m/s
• B. 20 m/s
• C. 12 m/s
• D. 26 m/s

Answer 1

The correct option is D 26 m/s

Acceleration due to gravity “g” = 9.81 $m/se{c}^2$

$v^2$ = $u^2+2as$

where u and v are initial and final velocities and "a"= acceleration due to gravity and “s” is the distance travelled

$v^2$ = 0 + 2*9.81*34 = 667.08

v = $\sqrt{667.08}m/sec$

v = 25.8458 m/sec $\approx$26m/sec

Hence option D is correct