The drawing shows an empty fuel tank about to be released by three different jet planes. at the moment of release, each plane has the same speed, and each tank is at the same height above the ground. however, the directions of the velocities of the planes are different. which tank has the largest speed upon hitting the ground? ignore friction and air resistance.

each tank hits the ground with same speed as above.

Explanation:

When fuel tanks are released there velocity u=0 m/s

all are released from the same height let it be h

let the velocity when they hit the ground be v

now using the equation

where g= acceleration due to gravity

put u=o and rearranging we get

clearly, velocity is only dependent on the height h, which is same for all hence, we conclude that each tank hits the ground with same speed as above.

gravity

explanation:

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s