Explanation
Body 1:
Initial Speed =0
Acceleration =9.8ms−2
Time =2 seconds
Now, we know that,
s=ut+12at2
So, s1=12×9.8×4
s1=19.6m
Body 2:
A black paper absorbs light of all the colours and reflects none.
∴0.04g−(0.03a+0.03g)=0.04a
0.01g=0.07a or a=0.098.07 or a=1.4
The acceleration of the system a=1.4m/s2
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