148809 A small body of mass $500 \mathrm{~g}$ moves on a rough horizontal surface before finally stops. The initial velocity of the body is $2 \mathrm{~m} / \mathrm{s}$ and coefficient of friction is 0.3 . Then, find absolute value of the average power developed by the frictional force during the time of motion. (Take, $g=10 \mathrm{~m} / \mathrm{s}^{2}$ )

148810 Consider a drop of rain water having mass $1 \mathrm{~g}$ falling from a height of $1 \mathrm{~km}$. It hits the ground with a speed of $50 \mathrm{~m} / \mathrm{s}$. Take $\mathrm{g}$ constant with a value of $10 \mathrm{~m} / \mathrm{s}^{2}$. The work done by the (i) gravitational force and the (ii) resistive force of air is

148811 A body of mass $m$ accelerates uniformly from rest to $v_{1}$ in time $t_{1}$. The instantaneous power delivered to the body as a function of time

148812 If a particle's position is given by $x=4-12 t+$ $3 t^{2}$ where $t$ is in the seconds and $x$ in meters. What is its velocity at $t=1 \mathrm{~s}$ ? Whether the particle is moving in $+\mathbf{x}$ direction or $-\mathbf{x}$ direction?

148813 A balloon has a mass of 10 gram in air. The air escapes from the balloon at a uniform rate with a velocity of $5 \mathrm{~cm} / \mathrm{s}$ and the balloon shrinks completely in $2.5 \mathrm{~s}$. The average force acting on the balloon will be

148809 A small body of mass $500 \mathrm{~g}$ moves on a rough horizontal surface before finally stops. The initial velocity of the body is $2 \mathrm{~m} / \mathrm{s}$ and coefficient of friction is 0.3 . Then, find absolute value of the average power developed by the frictional force during the time of motion. (Take, $g=10 \mathrm{~m} / \mathrm{s}^{2}$ )

148810 Consider a drop of rain water having mass $1 \mathrm{~g}$ falling from a height of $1 \mathrm{~km}$. It hits the ground with a speed of $50 \mathrm{~m} / \mathrm{s}$. Take $\mathrm{g}$ constant with a value of $10 \mathrm{~m} / \mathrm{s}^{2}$. The work done by the (i) gravitational force and the (ii) resistive force of air is

148811 A body of mass $m$ accelerates uniformly from rest to $v_{1}$ in time $t_{1}$. The instantaneous power delivered to the body as a function of time

148812 If a particle's position is given by $x=4-12 t+$ $3 t^{2}$ where $t$ is in the seconds and $x$ in meters. What is its velocity at $t=1 \mathrm{~s}$ ? Whether the particle is moving in $+\mathbf{x}$ direction or $-\mathbf{x}$ direction?

148813 A balloon has a mass of 10 gram in air. The air escapes from the balloon at a uniform rate with a velocity of $5 \mathrm{~cm} / \mathrm{s}$ and the balloon shrinks completely in $2.5 \mathrm{~s}$. The average force acting on the balloon will be

148809 A small body of mass $500 \mathrm{~g}$ moves on a rough horizontal surface before finally stops. The initial velocity of the body is $2 \mathrm{~m} / \mathrm{s}$ and coefficient of friction is 0.3 . Then, find absolute value of the average power developed by the frictional force during the time of motion. (Take, $g=10 \mathrm{~m} / \mathrm{s}^{2}$ )

148810 Consider a drop of rain water having mass $1 \mathrm{~g}$ falling from a height of $1 \mathrm{~km}$. It hits the ground with a speed of $50 \mathrm{~m} / \mathrm{s}$. Take $\mathrm{g}$ constant with a value of $10 \mathrm{~m} / \mathrm{s}^{2}$. The work done by the (i) gravitational force and the (ii) resistive force of air is

148811 A body of mass $m$ accelerates uniformly from rest to $v_{1}$ in time $t_{1}$. The instantaneous power delivered to the body as a function of time

148812 If a particle's position is given by $x=4-12 t+$ $3 t^{2}$ where $t$ is in the seconds and $x$ in meters. What is its velocity at $t=1 \mathrm{~s}$ ? Whether the particle is moving in $+\mathbf{x}$ direction or $-\mathbf{x}$ direction?

148813 A balloon has a mass of 10 gram in air. The air escapes from the balloon at a uniform rate with a velocity of $5 \mathrm{~cm} / \mathrm{s}$ and the balloon shrinks completely in $2.5 \mathrm{~s}$. The average force acting on the balloon will be

148809 A small body of mass $500 \mathrm{~g}$ moves on a rough horizontal surface before finally stops. The initial velocity of the body is $2 \mathrm{~m} / \mathrm{s}$ and coefficient of friction is 0.3 . Then, find absolute value of the average power developed by the frictional force during the time of motion. (Take, $g=10 \mathrm{~m} / \mathrm{s}^{2}$ )

148810 Consider a drop of rain water having mass $1 \mathrm{~g}$ falling from a height of $1 \mathrm{~km}$. It hits the ground with a speed of $50 \mathrm{~m} / \mathrm{s}$. Take $\mathrm{g}$ constant with a value of $10 \mathrm{~m} / \mathrm{s}^{2}$. The work done by the (i) gravitational force and the (ii) resistive force of air is

148811 A body of mass $m$ accelerates uniformly from rest to $v_{1}$ in time $t_{1}$. The instantaneous power delivered to the body as a function of time

148812 If a particle's position is given by $x=4-12 t+$ $3 t^{2}$ where $t$ is in the seconds and $x$ in meters. What is its velocity at $t=1 \mathrm{~s}$ ? Whether the particle is moving in $+\mathbf{x}$ direction or $-\mathbf{x}$ direction?

148813 A balloon has a mass of 10 gram in air. The air escapes from the balloon at a uniform rate with a velocity of $5 \mathrm{~cm} / \mathrm{s}$ and the balloon shrinks completely in $2.5 \mathrm{~s}$. The average force acting on the balloon will be

148809 A small body of mass $500 \mathrm{~g}$ moves on a rough horizontal surface before finally stops. The initial velocity of the body is $2 \mathrm{~m} / \mathrm{s}$ and coefficient of friction is 0.3 . Then, find absolute value of the average power developed by the frictional force during the time of motion. (Take, $g=10 \mathrm{~m} / \mathrm{s}^{2}$ )

148810 Consider a drop of rain water having mass $1 \mathrm{~g}$ falling from a height of $1 \mathrm{~km}$. It hits the ground with a speed of $50 \mathrm{~m} / \mathrm{s}$. Take $\mathrm{g}$ constant with a value of $10 \mathrm{~m} / \mathrm{s}^{2}$. The work done by the (i) gravitational force and the (ii) resistive force of air is

148811 A body of mass $m$ accelerates uniformly from rest to $v_{1}$ in time $t_{1}$. The instantaneous power delivered to the body as a function of time

148812 If a particle's position is given by $x=4-12 t+$ $3 t^{2}$ where $t$ is in the seconds and $x$ in meters. What is its velocity at $t=1 \mathrm{~s}$ ? Whether the particle is moving in $+\mathbf{x}$ direction or $-\mathbf{x}$ direction?

148813 A balloon has a mass of 10 gram in air. The air escapes from the balloon at a uniform rate with a velocity of $5 \mathrm{~cm} / \mathrm{s}$ and the balloon shrinks completely in $2.5 \mathrm{~s}$. The average force acting on the balloon will be