RRB Technician 2014 Ques 35
Question: When sand is heaped on a rotating disc, its angular velocity will
Options:
A) become zero
B) increase
C) remain constant
D) decrease
Show Answer
Answer:
Correct Answer: D
Solution:
- $ l,\omega $ is constant in the angular motion. $ l=MR^{2} $ When sand is poured and heaped on the disc, mass increases and so l increases. $ l,\omega $ = Constant Hence, if l increases, $ \omega $ decreases.
BETA
