Rotational Motion Question 160
Question: A metal sheet 14 cm x 2 cm of uniform thickness is cut into two pieces of width 2 cm. The two pieces are joined and laid along XY plane as shown. The centre of mass has the coordinates
Options:
A) (1, 1)
B) (7/2, 7/2)
C)(13/4, 9/4)
D) (12/7, 8/7)
Show Answer
Answer:
Correct Answer: C
Solution:
[c]
$X _{cm}=\frac{m\times 5.5+1\times m}{2m}=\frac{6.5}{2}=\frac{13}{4}cm.$
$Y _{cm}=\frac{m\times 3.5+1\times m}{2m}=\frac{4.5}{2}=\frac{9}{2}cm.$
