Explanation
Vibration is the periodic motion and the restoring force is the Force due to elastic property of body. Rigid body can not vibrate. Anything has mass and elasticity can vibrate.
Oscillation is also Periodic motion and restoring force is due to weight of the body. even rigid body can oscillate.
IN case of pendulum restoring force is weight of the body itself so the motion is oscillatory motion.
1 metre is the SI unit of length
1 millimetre (mm) is equivalent to 10−3m
1 Angstrom is equivalent to 10−10m
1 Fermi is equivalent to 10−15m
This means fermi is the smallest unit
Answer
Hence, the correct option is (c) fermi
Please disable the adBlock and continue. Thank you.