Why are mountain roads generally made winding upwards rather than going straight up ?
Why are mountain roads generally made winding upwards rather than going straight up ?
In order that the vehicle can go move with reasonable speed without skiding the sufficient centripetal force is managed by raising outer edge of track a little above inner one. This is done by keeping curved circular road.
Similar Questions
A block of mass $M$ rests on a rough horizontal table. A steadily increasing horizontal force is applied such that the block starts to slide on the table without toppling. The force is continued even after sliding has started. Assume the coefficients of static and kinetic friction between the table and the block to be equal. The correct representation of the variation of the frictional force $f$, exerted by the table on the block with time $t$ is given by
A block of mass $M$ rests on a rough horizontal table. A steadily increasing horizontal force is applied such that the block starts to slide on the table without toppling. The force is continued even after sliding has started. Assume the coefficients of static and kinetic friction between the table and the block to be equal. The correct representation of the variation of the frictional force $f$, exerted by the table on the block with time $t$ is given by
- [KVPY 2010]
A heavy box is to dragged along a rough horizontal floor. To do so, person $A$ pushes it at an angle $30^o$ from the horizontal and requires a minimum force $F_A$, while person $B$ pulls the box at an angle $60^o$ from the horizontal and needs minimum force $F_B$. If the coefficient of friction between the box and the floor is $\frac{{\sqrt 3 }}{5}$ , the ratio $\frac{{{F_A}}}{{{F_B}}}$ is
A heavy box is to dragged along a rough horizontal floor. To do so, person $A$ pushes it at an angle $30^o$ from the horizontal and requires a minimum force $F_A$, while person $B$ pulls the box at an angle $60^o$ from the horizontal and needs minimum force $F_B$. If the coefficient of friction between the box and the floor is $\frac{{\sqrt 3 }}{5}$ , the ratio $\frac{{{F_A}}}{{{F_B}}}$ is
- [JEE MAIN 2014]
$Assertion$ : On a rainy day it is difficult to drive a car or bus at high speed.
$Reason$ : The value of coefficient of friction is lowered due to wetting of the surface
$Assertion$ : On a rainy day it is difficult to drive a car or bus at high speed.
$Reason$ : The value of coefficient of friction is lowered due to wetting of the surface
- [AIIMS 1999]
A block of mass $5\,kg$ and surface area $2\,m ^2$ just begins to slide down an inclined plane when the angle of inclination is $30^{\circ}$. Keeping mass same, the surface area of the block is doubled. The angle at which this starts sliding down is :
In the given figure the acceleration of $M$ is $(g = 10 \,ms^{-2})$
In the given figure the acceleration of $M$ is $(g = 10 \,ms^{-2})$