A) Cemented surface
B) Carpeted surface
C) Sandy surface
D) Oily surface
Correct Answer: D
Solution :
The frictional force between the surface and the nail opposes the motion of the nail toward the magnet. The nail moves easily if this frictional force becomes less. Frictional force is less on an oily surface as compared to the force of friction on a cemented, carpeted, or sandy surface. Therefore, the distance d will be relatively large for an oily surface. The correct answer is D.You need to login to perform this action.
You will be redirected in
3 sec