Kinematics Question 755
Question: A wheel completes 2000 revolutions to cover the 9.5 km. distance. then the diameter of the wheel it’s [RPMT 1999]
Options:
A) 1.5 m
B)1.5 cm
C) 7.5 cm
D)7.5 m
Show Answer
Answer:
Correct Answer: A
Solution:
distance covered in n revolution = n 2p r= $ n\pi D $
$ \Rightarrow 2000\pi D=9500 $ [As n = 2000, distance = 9500 m]
therefore $ D=\frac{9500}{2000\times \pi }=1.5m $
