An aeroplane drops a slack of rice as shown in the figure with a horizontal velocity of 100 km/s. If the altitude of its travel is 10,000 km, from the ground determine the time needed for the sack to strike the ground.
1) 47.50 s
The origin of coordinates
is established at point K, where the initial velocity has (vK)x=100
km/s and (vK)y=0 as its components. Also between
points K and Q the accleration is g = -9.8m/s2.
So, the time taken t = 45.15 s