A1.8 kg baseball bat is swinging at 42m/s. it hits a 0.2 kg baseball. after the collision, the bat continues at 28 m/s.

Explanation:

The missing question her is: What is the change in momentum of the baseball?

According to the Impulse-Momentum Theorem, we have:

Where:

is the exerted force

is the time interval

is the change in momentum

So, in the case of the bat and the ball we have:

For the bat:

(1)

For the ball:

(2)

Since is the same for both the bat and the ball, their impulses are equal in magnitude but in opposite direction according to Newton's 3rd law of motion. Hence:

(3)

Then:

 (4)

Where:

Being , ,

Being

Then (4) is rewritten as:

 (5)

Since :

 (6)

Isolating :

(7)

(8)

(9)

Now, the change in momentum of the baseball is:

(10)

Substituting (9) in (10):

(11)

Finally:

This is the change in momentum of the baseball. Note it is negative because its initial velocity is greater than its final velocity

you go to your settings preference and in the end youll see sth that says "i want to delete my acc" click on it and u'll acc will be deleted but u have to wait.