Question

a bomb is dropped from an airplane moving horizontally with a speed of 200km/h. if the air resistance is negligible, the bomb will reach the ground in 5sec when altitude of the plane is approximately?

Answer 1

Answer on Question #42587, Physics, Mechanics | Kinematics | Dynamics

A bomb is dropped from an airplane moving horizontally with a speed of $200\mathrm{km/h}$. If the air resistance is negligible, the bomb will reach the ground in 5sec when altitude of the plane is approximately?

Solution:

The speed of the plane does not affect the time to fall. The distance $h$ that it falls in time t (when there is no initial vertical velocity component) is

$$h = \frac{g t^{2}}{2}$$

$g = 9.81\ \mathrm{m/s^2}$ is acceleration.

Thus,

$$h = \frac{9.81 \cdot 5^{2}}{2} = 122.6 \approx 123\ \mathrm{m}$$

Answer. $h = 123\ \mathrm{m}$.

http://www.AssignmentExpert.com/