Embibe Experts Solutions for Exercise 8: Assignment

A block of mass $10 \mathrm{kg}$ is hanging over a smooth and light pulley through a light string and the other end of the string is pulled down by a constant force $F$. The kinetic energy of the block increases by $20 \mathrm{J}$ in $1 \mathrm{s}$

A $5 \mathrm{kg}$ body is fired vertically up with a speed of $200 \mathrm{m} {\mathrm{s}}^{-1}$. Just before it hits the ground, its speed is $150 \mathrm{m} {\mathrm{s}}^{-1}$. Over the entire trip,

Consider a body of mass $0.2 \mathrm{kg}$ and a smooth incline of height $3.2 \mathrm{m}$ and length $10 \mathrm{m}$. Select the correct alternative

A light rigid rod of length $\ell$ is hinged at one end and it is free to rotate in a vertical plane. A particle of mass$m$ is attached to another end of the rod. The particle is released from rest at its highest point. Select the correct statement out of the following

Two particles $A$ and $B$ of masses $2 \mathrm{kg}$ and $3 \mathrm{kg}$ moving on a smooth horizontal surface with speed $1.5 \mathrm{m} {\mathrm{s}}^{-1}$ and $2 \mathrm{m} {\mathrm{s}}^{-1}$collide perfectly inelastically, then

A particle strikes a smooth horizontal surface at an angle $\theta >0$ and it rebounds at an angle $\varphi$ as shown

Friction between the rigid rod of mass $m$ and wedge of mass $2m$ is zero while the coefficient of friction between ground and wedge is $0.1$. A force $F$ is applied on the wedge, so that rod moves with constant velocity ${\mathrm{v}}_0=5 \mathrm{m} {\mathrm{s}}^{-1}$ in upward direction as shown. What will be the power($\mathrm{W}$) delivered by force $F$ ? (take $m=1 \mathrm{kg}, \mathrm{g}=10 \mathrm{m} {\mathrm{s}}^{-2}$)