Solve
Study
Textbooks
Guides
Join / Login
>>
Class 11
>>
Physics
>>
Laws of Motion
>>
Types of Friction
Types of Friction
Revise with Concepts
What is Rolling Friction?
Example
Definitions
Formulaes
Quick Summary With Stories
Rolling friction
3 mins read
Important Questions
State two advantages and disadvantages of friction.
Easy
View solution
>
Mention the methods used to decrease friction
Medium
View solution
>
Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. Their arrangements are given below.
Choose the correct arrangement.
Easy
View solution
>
Starting from rest ,a body slides down a 45
o
inclined plane in twice the time takes to slide down the same distance in the absence of friction .The coefficient of friction between the body and inclined plane is
Hard
View solution
>
A marble block of mass 2kg lying on ice when given a velocity of
6
m
s
−
1
is stopped by friction in 10s. Then the coefficient of friction is ( Take
g
=
1
0
m
s
−
2
)
Easy
View solution
>
A block weighing 20N rests on a horizontal surface. The coefficient of static friction between the block and surface is 0.4 and the coefficient of kinetic friction is 0.20.
a. How much is the friction force exerted on the block?
b. How much will the friction force be if a horizontal force 5N is exerted on the block?
c. What is the minimum force that will start the block in motion?
d. What is the minimum force that will keep the block in motion once it has been started?
e. If the horizontal force is 10N, what is the friction force?
Medium
View solution
>
A block of mass
1
k
g
lies on a horizontal surface in a truck, the coefficient of static friction between the block and the surface is
0
.
6
. What is the force of friction on the block if the acceleration of the truck is
5
m
/
s
2
?
(Take
g
=
1
0
m
/
s
2
)
Medium
View solution
>
A 50 kg crate is being pushed across a horizontal floor by a horizontal force of 575 N. If the coefficient of sliding friction is 0.25, what is the acceleration of the crate ?
Medium
View solution
>
A block of weight
1
0
0
N
is lying on a rough horizontal surface. If coefficient of friction
3
1
. The least possible force that can move the block is
Medium
View solution
>
Which one of the following statements is incorrect?
Medium
NEET
View solution
>