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A weight W rests on a rough horizontal plane . If the angle of friction is a the least force that will move the body along the plane will be Wcosa Wcota Wtana Wsina

A weight W rests on a rough horizontal plane . If the angle of friction is a the least force that will move the body along the plane will be
  • Wcosa
  • Wcota
  • Wtana
  • Wsina

Grade:11

2 Answers

Arun
25750 Points
6 years ago
Dear student
 
F = \mu mg
but
\mu = tan a
F = mg tan a
or
F = W tan a
hence option C is correct.
 
Regards
Arun (askiITians forum expert)
Deekshith
11 Points
5 years ago
Angle of friction=angle of repose.
When a body is kept on an inclened plane inclined at an angle equal to angle of repose then it will be ready to move.
i.e., least force that can moce the body along the plane.
So,
F=mg*sina
F=Wsina
So the least force required to move along the plane is Wsina.
So the option is D

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