Embibe Experts Solutions for Chapter: Laws of Motion, Exercise 1: KEAM 2020

A vehicle moving at $36 \mathrm{km}/\mathrm{h}$ is to be stopped by applying brakes in the next $5 \mathrm{m}.$ If the vehicle weight $2000 \mathrm{kg},$ determine the average force that must be applied on it

Two masses connected in series with two massless strings are hanging from a support as shown in the figure. Find the tension in the upper string

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A force of $(2\hat{\mathrm{i}}+3\hat{\mathrm{j}}) \mathrm{N}$ acts on a body of mass $1\mathrm{kg}$ which is at rest initially. The acceleration of the body is

A body of mass $2\mathrm{kg}$ is moving with a momentum of $10\mathrm{kg} {\mathrm{ms}}^{-1}.$ The force needed to increase its kinetic energy by four times in $10$ seconds is

A boy is standing on a weighing machine inside a lift. When the lift goes upwards with acceleration $\frac{\mathrm{g}}{4},$ the machine shows the reading $50\mathrm{kg}.$ wt. When the lift goes downward with acceleration $\frac{\mathrm{g}}{4},$ the reading of the machine in $\mathrm{kg}$. $\mathrm{wt}$. would be

A block of mass $20 \mathrm{kg}$ is suspended through two spring balances with negligible mass as shown in figure. What will be the readings in the upper and lower balance respectively ?