K K Sharma Solutions for Chapter: Friction, Exercise 1: TOPICWISE QUESTIONS

A block $A$, kept on an inclined surface, just begins to slide if the inclination is $30°$. The block is replaced by another block $B$ and it is found that it just begins to slide if the inclination is $40°$. This shows that

The minimum force $F$ required, so that block $A$ slips on block $B$ is

With reference to the figure shown, if the coefficient of friction at the surfaces is $0.42$, then, the force required to pull out the $6.0 \mathrm{kg}$ block with an acceleration of $1.50 \mathrm{m} {\mathrm{s}}^{-2}$ will be 

Two blocks $A$ and $B$ are shown in the figure. The minimum horizontal force $F$ applied on block $B$ for which slipping begins at $B$ and ground is

Choose the correct option.

In the below figure, a block $m_1$ of mass $10 \mathrm{kg}$ is kept on the block $m_2$ of mass $25 \mathrm{kg}$. The coefficient of friction between $m_2$ and the surface is $0.$ If $F=30 \mathrm{N}$, then, the acceleration of block of mass $m_1$ is

In the below figure, a block $m_1$ of mass $10 \mathrm{kg}$ is kept on the block $m_2$ of mass $25 \mathrm{kg}$. The coefficient of friction between $m_2$ and the surface is $0.$ If $F=250 \mathrm{N}$, then, the acceleration of the block of mass $m_1$ with respect to ground will be

The time when the relative motion between the blocks will stop is