NEET-XII-Physics
exam-1 year:2016
- #21A disk and a sphere of same radius but different
masses roll off on two inclined planes of the same
altitude and length. Which one of the two objects
gets to the bottom of the plane first ?
(1) Disk
(2) Sphere
(3) Both reach at the same time
(4) Depends on their massesdigAnsr: 2Ans : 2
Sol. a =
+
2
2
gsin
K
1
R
for disc ; = =
2
2
K 1
0.5
2R
for sphere ; = =
2
2
K 2
0.4
5R
a(sphere) > a(disc)
∴ sphere reaches first