Static Friction
Trending Questions
Is it easier to push or pull a body over a rough surface? Explain your answer.
The static frictional force is always greater than the kinetic frictional force.
- True
- False
Define static friction
Question 5
You spill a bucket of soapy water on a marble floor accidentally. Would it make it easier or more difficult for you to walk on the floor? Why?
Differentiate between Static and Sliding friction
What is the relationship among magnitude of friction and weight of the object
Why is it difficult to walk on a wet marble floor?
Why does a mixer jar become hot when it runs for a few minutes?
Why is it difficult to walk on muddy ground?
The body will move only when the force of friction
Is equal to the applied force
Is less than the applied force
Is greater than the applied force
Is zero
Why do we slip on a recently mopped floor?
How does a Ball bearing work?
- Sodium
- Caesium
- Sodium
(a) What is the difference between static and sliding friction? For a given pair of objects, which of the two is greater?
(b) How can a very heavy machine be moved conveniently from one place to another in a factory? (No crane is available for this purpose).
When we rub our hands together, frictional force gives rise to:
Light energy
Heat energy
Electrical energy
Chemical energy
A marble is allowed to roll down an inclined plane from a fixed height. At the foot of the inclined plane, it moves on a horizontal surface. On which surface will the marble move the shortest distance. Give the reason for your answer.
covered with silk cloth
covered with a layer of sand
covered with a glass sheet
Out of sliding friction, static friction and rolling friction:
(a) which one is the smallest ?
(b) which one is the largest ?
- 10N normal to the direction of motion
- 5N along the direction of applied force
- 5N opposite to the direction of applied force
- 10N opposite to the direction of applied force
- static friction
- kinetic friction
- rolling friction
- sliding friction
Friction can be increased by:
Making grooves and treads on the surface.
Streamlining the object.
Lubricating the two surfaces in contact.
All of the above.
A marble is allowed to roll down an inclined plane from a fixed height. At the foot of the inclined plane, it moves on a horizontal surface (a) covered with silk cloth (b) covered with a layer of sand and (c) covered with a glass sheet. On which surface will the marble move the shortest distance. Give reason for your answer.
What is the net force on the block, if I am pushing the block with force, F on a table which is applying a frictional force, f ? [2 MARKS]
- Sliding friction
- Rolling friction
- Static friction
- None of these
- 10 N
- 0 N
- Less than 10 N
- Greater than 10 N
Assuming all surfaces to be equally smooth, friction will change if the object is flipped and then dragged, as shown in the figure.
False
True
The friction that exists between two surfaces in contact, when there is no relative motion between them, is known as
- Infinite friction
Kinetic friction
Static friction
Sliding friction