A horizontal force of 129.4 ,N is applied on a 10, kg block which rests on a horizontal surface. If

English

Gujarati

Hindi

4-2.Friction

medium

A horizontal force of $129.4 \,N $ is applied on a $10\, kg$ block which rests on a horizontal surface. If the coefficient of friction is $0.3$, the acceleration should be ....... $m/s^2$

A

$9.8$

B

$10$

C

$12.6$

D

$19.6$

Solution

(b) From the relation $F – \mu mg = ma$

$a = \frac{{F – \mu mg}}{m} = \frac{{129.4 – 0.3 \times 10 \times 9.8}}{{10}} = 10\;m/{s^2}$

Standard 11

Physics

Share

Similar Questions

A body of mass $40\,kg$ resting on rough horizontal surface is subjected to a force $P$ which is just enough to start the motion of the body. If $\mu_{ s }=5, \mu_{ x }=0.4$, $g =10\,m / s ^2$ and the force $P$ is continuously applied on the body, then the acceleration of the body is $………m/s^{2}$

hard

(AIIMS-2015)

A block of mass $5\,kg$ is placed at rest on a table of rough surface. Now, if a force of $30\,N$ is applied in the direction parallel to surface of the table, the block slides through a distance of $50\,m$ in an interval of time $10\,s$. Coefficient of kinetic friction is (given, $g =10\,ms ^{-2}$)

medium

(JEE MAIN-2023)

A car accelerates on a horizontal road due to force exerted by

easy

A monkey of mass $m$ is climbing a rope hanging from the roof with acceleration $a$. The coefficient of static friction between the body of the monkey and the rope is $\mu$. Find the direction and value of friction force on the monkey.

medium

Consider a block and trolley system as shown in figure. If the coefficient of kinetic friction between the trolley and the surface is $0.04$ , the acceleration of the system in $\mathrm{ms}^{-2}$ is :

(Consider that the string is massless and unstretchable and the pulley is also massless and frictionless):

medium

(JEE MAIN-2024)