148988 A bullet of mass $50 \mathrm{~g}$ is fired from a rifle of mass $2 \mathrm{~kg}$ and the total kinetic energy produced by the explosion is $2050 \mathrm{~J}$. Then the kinetic energy of the bullet and the rifle are

148989 A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $1 \mathrm{~m} / \mathrm{s}$ so as to have same K.E. as that of the boy. The original speed of the man will be

148990 A body accelerates uniformly from rest to a velocity of $1 \mathrm{~ms}^{-1}$ in 15 second. The kinetic energy of the body will be $\frac{2}{9} J$ when ' $t$ ' is equal to [Take mass of body as $1 \mathrm{~kg}$ ]

148991 A light and heavy body have equal momentum, which one has greater kinetic energy?

148992 A policeman fires a bullet of mass $50 \mathrm{~g}$ with a speed of $200 \mathrm{~m} / \mathrm{s}$, in a wooden piece of thickness $2.0 \mathrm{~cm}$. The bullet leaves the wooden piece with only $10 \%$ of its initial kinetic energy. By how much percentage has the speed of the bullet been reduced?

148988 A bullet of mass $50 \mathrm{~g}$ is fired from a rifle of mass $2 \mathrm{~kg}$ and the total kinetic energy produced by the explosion is $2050 \mathrm{~J}$. Then the kinetic energy of the bullet and the rifle are

148989 A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $1 \mathrm{~m} / \mathrm{s}$ so as to have same K.E. as that of the boy. The original speed of the man will be

148990 A body accelerates uniformly from rest to a velocity of $1 \mathrm{~ms}^{-1}$ in 15 second. The kinetic energy of the body will be $\frac{2}{9} J$ when ' $t$ ' is equal to [Take mass of body as $1 \mathrm{~kg}$ ]

148991 A light and heavy body have equal momentum, which one has greater kinetic energy?

148992 A policeman fires a bullet of mass $50 \mathrm{~g}$ with a speed of $200 \mathrm{~m} / \mathrm{s}$, in a wooden piece of thickness $2.0 \mathrm{~cm}$. The bullet leaves the wooden piece with only $10 \%$ of its initial kinetic energy. By how much percentage has the speed of the bullet been reduced?

148988 A bullet of mass $50 \mathrm{~g}$ is fired from a rifle of mass $2 \mathrm{~kg}$ and the total kinetic energy produced by the explosion is $2050 \mathrm{~J}$. Then the kinetic energy of the bullet and the rifle are

148989 A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $1 \mathrm{~m} / \mathrm{s}$ so as to have same K.E. as that of the boy. The original speed of the man will be

148990 A body accelerates uniformly from rest to a velocity of $1 \mathrm{~ms}^{-1}$ in 15 second. The kinetic energy of the body will be $\frac{2}{9} J$ when ' $t$ ' is equal to [Take mass of body as $1 \mathrm{~kg}$ ]

148991 A light and heavy body have equal momentum, which one has greater kinetic energy?

148992 A policeman fires a bullet of mass $50 \mathrm{~g}$ with a speed of $200 \mathrm{~m} / \mathrm{s}$, in a wooden piece of thickness $2.0 \mathrm{~cm}$. The bullet leaves the wooden piece with only $10 \%$ of its initial kinetic energy. By how much percentage has the speed of the bullet been reduced?

148988 A bullet of mass $50 \mathrm{~g}$ is fired from a rifle of mass $2 \mathrm{~kg}$ and the total kinetic energy produced by the explosion is $2050 \mathrm{~J}$. Then the kinetic energy of the bullet and the rifle are

148989 A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $1 \mathrm{~m} / \mathrm{s}$ so as to have same K.E. as that of the boy. The original speed of the man will be

148990 A body accelerates uniformly from rest to a velocity of $1 \mathrm{~ms}^{-1}$ in 15 second. The kinetic energy of the body will be $\frac{2}{9} J$ when ' $t$ ' is equal to [Take mass of body as $1 \mathrm{~kg}$ ]

148991 A light and heavy body have equal momentum, which one has greater kinetic energy?

148992 A policeman fires a bullet of mass $50 \mathrm{~g}$ with a speed of $200 \mathrm{~m} / \mathrm{s}$, in a wooden piece of thickness $2.0 \mathrm{~cm}$. The bullet leaves the wooden piece with only $10 \%$ of its initial kinetic energy. By how much percentage has the speed of the bullet been reduced?

148988 A bullet of mass $50 \mathrm{~g}$ is fired from a rifle of mass $2 \mathrm{~kg}$ and the total kinetic energy produced by the explosion is $2050 \mathrm{~J}$. Then the kinetic energy of the bullet and the rifle are

148989 A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $1 \mathrm{~m} / \mathrm{s}$ so as to have same K.E. as that of the boy. The original speed of the man will be

148990 A body accelerates uniformly from rest to a velocity of $1 \mathrm{~ms}^{-1}$ in 15 second. The kinetic energy of the body will be $\frac{2}{9} J$ when ' $t$ ' is equal to [Take mass of body as $1 \mathrm{~kg}$ ]

148991 A light and heavy body have equal momentum, which one has greater kinetic energy?

148992 A policeman fires a bullet of mass $50 \mathrm{~g}$ with a speed of $200 \mathrm{~m} / \mathrm{s}$, in a wooden piece of thickness $2.0 \mathrm{~cm}$. The bullet leaves the wooden piece with only $10 \%$ of its initial kinetic energy. By how much percentage has the speed of the bullet been reduced?