Question
Physics Question on rotational motion
A 10kg body hangs at rest from a rope wrapped around a cylinder of 0.2 m in diameter. The torque applied about the horizontal axis of the cylinder is:
A
98 Nm
B
19.6 Nm
C
196 Nm
D
9.8 Nm
Answer
9.8 Nm
Explanation
Solution
Given :
Torque, we know is as follows :
T = r × F
= r × T
= r × m × g
= 0.1 × 10 × 9.8
= 9.8 Nm
So, the correct option is (D) : 9.8 Nm