Question

a m =0.09 tennis ball initially moving at a speed of 10m\s in the opposite direction of a speed of 18m/s what is the magnitude of the change in momentum of the ball

Answer 1

First the ball is going in negative direction ?

Answer 2

the sign is not applicable here

Answer 3

hello anyone there

Answer 4

momentum p=mv
so first calculate the initial momentum,
then the final momentum
and then subtract the final momentum from the initial momentum.
(provide units!)

Answer 5

what units are required for this, is it Kgm/s

Answer 6

i meant mass for the tennis ball. i told u how to do the question now do it.

Answer 7

the calculation is the easy part the units is where i am loosing grades

Answer 8

i put Kgm/s for my last answer and they told me i was wrong, i don,t know what other units i can put in

Answer 9

0.72Kgm/s is my answer for this,

Answer 10

it is supposed to be like this:
initial momentum=m*u
=0.09kg*10m/s
=? kgm/s

final momentum=m*v
=0.09kg*(-18)m/s
=? kgm/s

change in momentum = initial momentum-final momentum
=? kgm/s

Answer 11

i know so now if they tell me i'm, wrong there'll be trouble, thanks for your time

Answer 12

hey your answer is still wrong!!!!
do the calculations correctly

Answer 13

\[\Delta p=p_f-p_i \rightarrow \Delta p=(0.09kg)(10\frac{m}{s})-(0.09kg)(-18\frac{m}{s})=?\]

Answer 14

The sign IS applicable in this case, unlike what you said.