Please help The position of masses 4kg, 6kg, 7kg, 10kg, 2kg, and 12kg are (-1,1), (4,2), (-3,-2), (5,-4), (-2,4) and (3,-5) resp
Sophie [7]
Answer:
(1.9756, -2.1951)
Explanation:
The center of mass equation is:
=
, where m represents the masses and x represents the position.
In order to find the coordinates of the center of mass, we need to use this equation for both the x-values and the y-values.
<u>x-values:</u>
<u />
=
=
=
=
= 1.9756
<u>y-values:</u>
<u />
=
=
=
=
= -2.1951
<u>center of mass:</u>
(1.9756, -2.1951)
Explanation:
v=140 m/s
t=50s
u=0
change of velocity = v-u
140-0=140 m/s
for acceleration:
from Newton's first law of motion:
v=u+at
140=0+a50
50a=140
a=140/50
a=2.8 m/s²
<span>Since d=m/v. 122 g (mass) divided by 10 cm3 (volume)=</span>12.2 g/cm<span>3
Your answer would be 12.2 g/cm3
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