Which of the following term is wrong about kinetic friction?

It is a contact force.

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

It is an electro-magnetic force.

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

It decreases speed of the object.

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

It opposes relative velocity.

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

Open in App

Solution

The correct option is C It decreases speed of the object.

Here $V_{1} > V_{2}$ and upper block is slowly placed on the lower block.

For upper block, friction opposes velocity & for lower block, friction supports velocity, so that both the blocks will not move relative to each other. So, sometimes kinetic friction decreases speed of object in contact and sometimes increases its speed.

Suggest Corrections

Similar questions

Which of the following is/are true about the frictional force?

1. It acts between all moving objects.

2. It always opposes relative motion between two objects.

3. It is a contact force.

4. It is a non- contact force.

Which of the following statements are correct about the force of friction?

1. It acts on all moving objects.

2. It opposes the relative motion between two objects in contact with each other.

3. It is a contact force.

Which of the following is/are true about frictional force?

1. It depends on the nature of the surface in contact.

2. It always opposes relative motion between two objects.

3. It is a contact force.

4. It is a non- contact force.

"Friction is a force which opposes the relative motion between two objects”.

Join BYJU'S Learning Program