Asupply bag is dropped from a rescue plane. after the bag falls for 3.2 seconds , what is the velocity of the bag?

-31.36 m/s

Explanation:

This is a problem of motion in one direction (specifically vertical motion), and the equation that best fulfills this approach is:

 (1)

Where:

is the final velocity of the supply bag

is the initial velocity of the supply bag (we know it is zero because we are told it was "dropped", this means it goes to ground in free fall)

is the acceleration due gravity (the negtive sign indicates the gravity is downwards, in the direction of the center of the Earth)

is the time

Knowing this, let's solve (1):

 (2)

Finally:

 Note the negative sign is because the direction of the bag is downwards as well.

compass can be used day and night, cloudy or sunny