You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VIII

Physics

Frictional Force

A body of mas...

Question

A body of mass $m$ lies at rest on a rough horizontal surface. The frictional force acting on he body is

m g

No worries! We‘ve got your back. Try BYJU‘S free classes today!

2 m g

No worries! We‘ve got your back. Try BYJU‘S free classes today!

\frac{m g}{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Zero

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D Zero
We know that when an object is at rest, static friction comes into existence when a force is applied to it and it varies gradually. So when the object is lying on a rough surface and no force is applied to it then there is nothing to resist hence friction is also zero.

Suggest Corrections

Similar questions

Q. Read the following two statements and then identify the correct choice of the given answers.
A : The frictional force acting on a body of mass m which is at rest on a horizontal surface of coefficient of static friction

^{'} μ_{s}^{'}

μ_{s} m g

in the absence of external force.
B : The frictional force acting on a body of mass m which is at rest on a rough inclined surface of angle of inclination

θ

is mg sin

θ

Q. A force is acting on a body of mass

3 k g

kept on a rough horizontal surface. If a friction force of

40 N

is required to keep the body at rest under the action of this external force. Find the contact force acting on the body. (Take

g = 10 m / s^{2}

)

Q. A force is acting on a body of mass

3 kg

kept on a rough horizontal surface. If a friction force of

40 N

is required to keep the body at rest under the action of this external force. Then find the contact force acting on the body.

(g = 10 {m/s}^{2})

A solid sphere of mass ‘m’ and radius R rolls on a horizontal rough surface without slipping due to a horizontal force ‘F’ acting at the top of the sphere. Then the frictional force acting between the body and the surface is

Q. A force is acting on a body of mass

3 k g

kept on a rough horizontal surface. If a friction force of

40 N

is required to keep the body at rest under the action of this external force. Find the contact force acting on the body. (Take

g = 10 m / s^{2}

)

Join BYJU'S Learning Program

A body of mass m lies at rest on a rough horizontal surface. The frictional force acting on he body is

The correct option is D ZeroWe know that when an object is at rest, static friction comes into existence when a force is applied to it and it varies gradually. So when the object is lying on a rough surface and no force is applied to it then there is nothing to resist hence friction is also zero.

A body of mass $m$ lies at rest on a rough horizontal surface. The frictional force acting on he body is

The correct option is D Zero
We know that when an object is at rest, static friction comes into existence when a force is applied to it and it varies gradually. So when the object is lying on a rough surface and no force is applied to it then there is nothing to resist hence friction is also zero.