A block of mass $10 \,kg$ is released on rough incline plane. Block start descending with acceleration $2 \,m / s ^2$. Kinetic friction force acting on block is ..... $N$ (take $g=10 \,m / s ^2$ )
Medium
Download our app for free and get started
(b)
$a_{\text {down }}=2 m / s$
$a _{\text {down }}=g \sin 30-\mu g \cos 30$
$f =\mu mg \cos 30$
$2=\frac{ g }{2}-\frac{ f }{ m }$
$\frac{ f }{ m }=5-2 \quad=3$
$f =10 \times 3 \quad=30\,N$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1$Assertion$ : Mountain roads rarely go straight up the slope.View Solution
$Reason$ : Slope of mountains are large, therefore more chances of vehicle to slip from roads - 2A car of mass $1000\,kg$ negotiates a banked curve of radius $90\,m$ on a frictionless road. If banking angle is $45^o$ , the maximum speed of car is ............ $m/s$ $[g = 10\,m/s^2]$View Solution
- 3A car of mass $1000\, kg$ negotiates a banked curve of radius $90\, m$ on a frictionless road. If the banking angle is $45^o $, the speed of the car is ....... $ms^{-1}$View Solution
- 4A $\vec F\,\, = \,\,\hat i\, + \,4\hat j\,$ acts on block shown. The force of friction acting on the block is :View Solution
- 5Consider the system shown below. A horizontal force $F$ is applied to a block $X$ of mass $8 \,kg$, such that the block $Y$ of mass $2 \,kg$ adjacent to it does not slip downwards under gravity. There is no friction between the horizontal plane and the base of the block $X$. The coefficient of friction between the surfaces of blocks $X$ and $Y$ is $0.5$. The minimum value of $F$ is ............ $N$ (take, acceleration due to gravity to be $10 \,ms ^{-2}$ )View Solution
- 6Two particles of equal masses are revolving in circular paths of radii ${r_1}$ and ${r_2}$ respectively with the same speed. The ratio of their centripetal forces isView Solution
- 7Abody is placed on a rough inclined plane of inclination $\theta$ .As the angle $\theta$ is increased from $0^o$ to $90^o$ the contact force between the block and the planeView Solution
- 8On the horizontal surface of a truck a block of mass $1 \;kg$ is placed $(\mu=0.6)$ and truck is moving with acceleration $5\; m / sec ^2$ then the frictional force on the block will beView Solution
- 9If force $F$ is increasing with time and at $t = 0 , F = 0$ where will slipping first start?View Solution
- 10A railway line is taken round a circular arc of radius $1000\ m$ , and is banked by raising the outer rail $h$ $m$ above the inner rail. If the lateral force on the inner rail when a train travels round the curve at $10\ ms^{-1}$ is equal to the lateral force on the outer rail when the train's speed is $20\ ms^{-1}$ . The value of $4g\ tan\theta $ is equal to : (The distance between the rails is $1.5\ m$ )View Solution
