148938 A bag of sand of mass $9.8 \mathrm{~kg}$ is suspended by a rope. A bullet of $200 \mathrm{~g}$ travelling with speed 10 $\mathrm{ms}^{-1}$ gets embedded in it, then loss of kinetic energy will be

148939 The potential energy of an object is $U(x)=\left(5 x^{2}\right.$ $\left.-4 x^{3}\right) J$, where $x$ is the position in meter. The position at which the force becomes zero is

148940 An object of mass $7 \mathrm{~kg}$ initially at rest explodes into two pieces $A$ and $B$. The mass of $A$ is $3 \mathrm{~kg}$. and the mass of $B$ is $4 \mathrm{~kg}$. After explosion, $B$ moves with the velocity of $2 \mathrm{~m} / \mathrm{s}$. The ratio of kinetic energy of $A$ to kinetic energy of $B$ is

148941 A particle is released from height $S$ from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively

148938 A bag of sand of mass $9.8 \mathrm{~kg}$ is suspended by a rope. A bullet of $200 \mathrm{~g}$ travelling with speed 10 $\mathrm{ms}^{-1}$ gets embedded in it, then loss of kinetic energy will be

148939 The potential energy of an object is $U(x)=\left(5 x^{2}\right.$ $\left.-4 x^{3}\right) J$, where $x$ is the position in meter. The position at which the force becomes zero is

148940 An object of mass $7 \mathrm{~kg}$ initially at rest explodes into two pieces $A$ and $B$. The mass of $A$ is $3 \mathrm{~kg}$. and the mass of $B$ is $4 \mathrm{~kg}$. After explosion, $B$ moves with the velocity of $2 \mathrm{~m} / \mathrm{s}$. The ratio of kinetic energy of $A$ to kinetic energy of $B$ is

148941 A particle is released from height $S$ from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively

148938 A bag of sand of mass $9.8 \mathrm{~kg}$ is suspended by a rope. A bullet of $200 \mathrm{~g}$ travelling with speed 10 $\mathrm{ms}^{-1}$ gets embedded in it, then loss of kinetic energy will be

148939 The potential energy of an object is $U(x)=\left(5 x^{2}\right.$ $\left.-4 x^{3}\right) J$, where $x$ is the position in meter. The position at which the force becomes zero is

148940 An object of mass $7 \mathrm{~kg}$ initially at rest explodes into two pieces $A$ and $B$. The mass of $A$ is $3 \mathrm{~kg}$. and the mass of $B$ is $4 \mathrm{~kg}$. After explosion, $B$ moves with the velocity of $2 \mathrm{~m} / \mathrm{s}$. The ratio of kinetic energy of $A$ to kinetic energy of $B$ is

148941 A particle is released from height $S$ from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively

148938 A bag of sand of mass $9.8 \mathrm{~kg}$ is suspended by a rope. A bullet of $200 \mathrm{~g}$ travelling with speed 10 $\mathrm{ms}^{-1}$ gets embedded in it, then loss of kinetic energy will be

148939 The potential energy of an object is $U(x)=\left(5 x^{2}\right.$ $\left.-4 x^{3}\right) J$, where $x$ is the position in meter. The position at which the force becomes zero is

148940 An object of mass $7 \mathrm{~kg}$ initially at rest explodes into two pieces $A$ and $B$. The mass of $A$ is $3 \mathrm{~kg}$. and the mass of $B$ is $4 \mathrm{~kg}$. After explosion, $B$ moves with the velocity of $2 \mathrm{~m} / \mathrm{s}$. The ratio of kinetic energy of $A$ to kinetic energy of $B$ is

148941 A particle is released from height $S$ from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively