Embibe Experts Solutions for Chapter: Laws of Motion, Exercise 1: TS EAMCET - 5 August 2021 Shift 1

Which of the following statement is correct?

Consider a rocket is being fired. The kinetic energy of the rocket is increased by $16$ times where as its total mass is reduced by half through the burning of fuel. The factor by which its momentum increases is

Consider two masses $m_1$ and $m_2$ are connected through a pulley. Mass ' $m_2$ ' stats from rest at height ' $h$ ' and falls down. With what speed it hits the ground? (Assume no friction and massless strings & pulleys)

A ball of mass $0.2 \mathrm{kg}$ moving with a speed of $20 \mathrm{m} {\mathrm{s}}^{-1}$ is brought to rest in $0.1 \mathrm{s}.$ The average force applied to the ball is

System shown in the figure is in equilibrium and at rest. The spring and string are massless, now the string is cut. The acceleration of mass $2m$ and $m$ just after the string is cut will be

Block $A$ of mass $3 \mathrm{kg}$ rests on another block $B$ of mass $7 \mathrm{kg}.$ The coefficient of friction between $A$ and $B$ is $0.4$ while the coefficient of friction between $B$ and the horizontal floor on which $B$ rests is $0.55.$ Find the force of friction between $A$ and $B,$ when a horizontal force of $50 \mathrm{N}$ is applied on the block $B.$
(Use $\mathrm{g}=10 \mathrm{m}/{\mathrm{s}}^2$)

What is the maximum force $F$ that can be applied on block $m_1,$ so that both $m_1 \&{ m}_2$ will move together? There is no friction between $m_1$ and the horizontal table. The coefficient of friction between $\text{'}{m}_1\text{'}$ and $\text{'}{m}_2\text{'}$ is $\mu .$

A person is managing to be at rest between two vertical walls by pressing one wall by his hands and feet and second wall with his back. The coefficient of friction is $0.5$ between his body and the wall. If the force with which the person pushes the wall is $500 \mathrm{N},$ then the mass of the person is (Take $g=10 \mathrm{m} {\mathrm{s}}^{-2}$)