I found the answers here. Hope this helps you! https://1.cdn.edl.io/sJTle6yxt3qVq7jHfdHRZJ3Xogj7ps6swBO9umNcZ6PO3SMN.docx
Answer:

T=157.06 N
Explanation:
Given that
Mass of first block = 21.1 kg
Mass of second block = 12.9 kg
First mass is heavier than first that is why mass second first will go downward and mass second will go upward.
Given that pulley and string is mass less that is why both mass will have same acceleration.So lets take their acceleration is 'a'.
So now from force equation

21.1 x 9.81 - 12.9 x 9.81 =(21.1+12.9) a

Lets tension in string is T


T=21.1(9.81-2.36) N
T=157.06 N
Answer: 52.53
Explanation:
m*g = 5.36k * 9.8N/kg = 52.53 N. = Wt.
of object.
a. KE = 0 J. = Initial KE
V^2 = Vo^2 + 2g*h
V^2 = 0 + 19.6*1 = 19.6
V = 4.43 m/s.
KE = 0.5m*V^2 = 2.68*4.43^2 = 52.59 J.
b. V^2 = Vo^2 + 2g*h
V^2 = 4.43^2 + 19.6*1 = 39.22
V = 6.26 m/s.
KEo = 2.68*4.43^2 = 52.59 J.
KE = 2.68*6.26^2 = 105 J.
Answer:
0.83
Explanation:
to figure out what m/s is you would divide the distance by time.
1000 divided by 1200 is equal to .83 so
.83 m/s as your final answer