Frictional Force
Trending Questions
Give examples to show that friction is both a friend and a foe.
Why is friction important?
What do you mean by " Friction opposes relative motion "?
Imagine that friction suddenly vanishes. How would life be affected? List ten such situations.
Name the force which always opposes motion.
Friction is necessary evil why?
Why is motion relative not absolute?
What is meant by saying that the friction is a self-adusting force
Suppose your writing table (or desk) is titled a little. A book kept on the table starts sliding down. Draw a diagram to show the direction of force of friction acting on the book.
What is the direction of force of friction acting on a moving object?
What's required for a force to come in to play?
When we try to push a very heavy box kept on the ground, it does not move at all. Which force is preventing this box to move forward? Where does this force act?
- pressure
- friction
- its shape
What are the four types of resistance forces?
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
Only if the objects are solid
only if one of the two objects is liquid
Only if one of the two objects is gaseous
Irrespective of whether the objects are solid, liquid or gas
How does a bicycle stop when its brakes are applied ?
Friction can be reduced to zero by applying lots of lubricants between surfaces.
False
True
- Newton
- Joule
- Pascal
- Watt
Question 1 (c)
Fill in the blank:
Friction produces _________.
A vehicle slows down on applying brakes. This happens because of
Magnetic force
Frictional force
Electric force
None of the above
Give three examples to illustrate that friction is a necessary evil.
Describe the fight between the man and the machine
If a force is applied on a wheel at a point as shown in the figure which makes it roll on the ground, then where is the force of friction acting? [2 MARKS]
- contact force
- electrostatic force
- magnetic force
- non-contact force
Answer the following questions in short.
Give two examples that friction produces heat.
(a) Define frictional force (or friction)
(b) Explain why frictional force is said to be a contact force.
(c) Explain why magnetic force is said to be a non-contact force.
1)define friction
2)what is interlocking
3)explain lubricants
4)define rolling friction, sliding friction, static friction
in3 lines
