High school physics momentum

Question

A 3.2 kg object is dropped from a height of 3.4 m. what is the momentum (in kgm/s) after 0.22 seconds?

the answer is 6.49 kgm/s, plz show work

Answer 1

To calculate the momentum after a period of time for a dropped object, we need to know its velocity and mass at that period of time.

A dropped object begins with a zero downward velocity and has an acceleration equal to the gravitational acceleration which is about 9.8 m/s^2.

Its velocity after 0.22 s is given by V = Vo + gt where Vo = 0, g= 9.8 m/s^2 and t = 0.22 s.

Solving gives 2.16 m/s for V.

The momentum is M = mV = 3.2 kg x 2.16 m/s = 6.9 kgm/s. This doesn't exactly match your given answer; I am not sure why.