Which of the following is correct, when a person walks on a rough surface
The frictional force exerted by the surface keeps him moving
The force which the man exerts on the floor keeps him moving
The reaction of the force which the man exerts on floor keeps him moving
None of the above
A block slides down on incline of angle $30^o$ with an acceleration $\frac{g}{4}$. Find the coefficient of kinetic friction
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 ....... $m/s^2$
It is difficult to move a cycle with brakes on because
A block of mass $10\, kg$ starts sliding on a surface with an initial velocity of $9.8\, ms ^{-1}$. The coefficient of friction between the surface and bock is $0.5$. The distance covered by the block before coming to rest is: [use $g =9.8\, ms ^{-2}$ ].........$m$
What is rolling friction ? Write laws of rolling friction. Define coefficient of rolling friction.