149169 Particle A moving with a velocity $v=10 \mathrm{~m} / \mathrm{s}$ experienced a head on collision with a stationary particle $B$ of the same mass. As a result of collision, the kinetic energy of the system decreased by $1 \%$. The speed of particle $A$ after collision is
149171 A body of mass $3 \mathrm{~kg}$ is moving with a velocity of $8 \mathrm{~m} \cdot \mathrm{s}^{-1}$ collides head on with another body of mass $1 \mathrm{~kg}$ moving in the opposite direction with a velocity of $4 \mathrm{~m} . \mathrm{s}^{-1}$. After the collision, if the two bodies stick together and move, they move with a common velocity
149170
Assertion (A): In an elastic collision of two billiard balls, both kinetic energy and linear momentum remain conserved.
Reason (R) During the collision of the balls, as the collision is elastic there is no exchange of energy. Therefore, both energy and momentum are conserved.
The correct option among the following is
149173 An object $\mathrm{A}$ of mass $20 \mathrm{~kg}$ and travelling at 20 $\mathrm{m} / \mathrm{s}$ crashes into another object $B$ of mass 200 $\mathrm{kg}$ and travelling at $10 \mathrm{~m} / \mathrm{s}$, in the same direction. After the collision, object $A$ bounces back in opposite direction at a speed of $10 \mathrm{~m} / \mathrm{s}$. The speed of the object $B$ after the collision is:
149169 Particle A moving with a velocity $v=10 \mathrm{~m} / \mathrm{s}$ experienced a head on collision with a stationary particle $B$ of the same mass. As a result of collision, the kinetic energy of the system decreased by $1 \%$. The speed of particle $A$ after collision is
149171 A body of mass $3 \mathrm{~kg}$ is moving with a velocity of $8 \mathrm{~m} \cdot \mathrm{s}^{-1}$ collides head on with another body of mass $1 \mathrm{~kg}$ moving in the opposite direction with a velocity of $4 \mathrm{~m} . \mathrm{s}^{-1}$. After the collision, if the two bodies stick together and move, they move with a common velocity
149170
Assertion (A): In an elastic collision of two billiard balls, both kinetic energy and linear momentum remain conserved.
Reason (R) During the collision of the balls, as the collision is elastic there is no exchange of energy. Therefore, both energy and momentum are conserved.
The correct option among the following is
149173 An object $\mathrm{A}$ of mass $20 \mathrm{~kg}$ and travelling at 20 $\mathrm{m} / \mathrm{s}$ crashes into another object $B$ of mass 200 $\mathrm{kg}$ and travelling at $10 \mathrm{~m} / \mathrm{s}$, in the same direction. After the collision, object $A$ bounces back in opposite direction at a speed of $10 \mathrm{~m} / \mathrm{s}$. The speed of the object $B$ after the collision is:
149169 Particle A moving with a velocity $v=10 \mathrm{~m} / \mathrm{s}$ experienced a head on collision with a stationary particle $B$ of the same mass. As a result of collision, the kinetic energy of the system decreased by $1 \%$. The speed of particle $A$ after collision is
149171 A body of mass $3 \mathrm{~kg}$ is moving with a velocity of $8 \mathrm{~m} \cdot \mathrm{s}^{-1}$ collides head on with another body of mass $1 \mathrm{~kg}$ moving in the opposite direction with a velocity of $4 \mathrm{~m} . \mathrm{s}^{-1}$. After the collision, if the two bodies stick together and move, they move with a common velocity
149170
Assertion (A): In an elastic collision of two billiard balls, both kinetic energy and linear momentum remain conserved.
Reason (R) During the collision of the balls, as the collision is elastic there is no exchange of energy. Therefore, both energy and momentum are conserved.
The correct option among the following is
149173 An object $\mathrm{A}$ of mass $20 \mathrm{~kg}$ and travelling at 20 $\mathrm{m} / \mathrm{s}$ crashes into another object $B$ of mass 200 $\mathrm{kg}$ and travelling at $10 \mathrm{~m} / \mathrm{s}$, in the same direction. After the collision, object $A$ bounces back in opposite direction at a speed of $10 \mathrm{~m} / \mathrm{s}$. The speed of the object $B$ after the collision is:
149169 Particle A moving with a velocity $v=10 \mathrm{~m} / \mathrm{s}$ experienced a head on collision with a stationary particle $B$ of the same mass. As a result of collision, the kinetic energy of the system decreased by $1 \%$. The speed of particle $A$ after collision is
149171 A body of mass $3 \mathrm{~kg}$ is moving with a velocity of $8 \mathrm{~m} \cdot \mathrm{s}^{-1}$ collides head on with another body of mass $1 \mathrm{~kg}$ moving in the opposite direction with a velocity of $4 \mathrm{~m} . \mathrm{s}^{-1}$. After the collision, if the two bodies stick together and move, they move with a common velocity
149170
Assertion (A): In an elastic collision of two billiard balls, both kinetic energy and linear momentum remain conserved.
Reason (R) During the collision of the balls, as the collision is elastic there is no exchange of energy. Therefore, both energy and momentum are conserved.
The correct option among the following is
149173 An object $\mathrm{A}$ of mass $20 \mathrm{~kg}$ and travelling at 20 $\mathrm{m} / \mathrm{s}$ crashes into another object $B$ of mass 200 $\mathrm{kg}$ and travelling at $10 \mathrm{~m} / \mathrm{s}$, in the same direction. After the collision, object $A$ bounces back in opposite direction at a speed of $10 \mathrm{~m} / \mathrm{s}$. The speed of the object $B$ after the collision is:
149169 Particle A moving with a velocity $v=10 \mathrm{~m} / \mathrm{s}$ experienced a head on collision with a stationary particle $B$ of the same mass. As a result of collision, the kinetic energy of the system decreased by $1 \%$. The speed of particle $A$ after collision is
149171 A body of mass $3 \mathrm{~kg}$ is moving with a velocity of $8 \mathrm{~m} \cdot \mathrm{s}^{-1}$ collides head on with another body of mass $1 \mathrm{~kg}$ moving in the opposite direction with a velocity of $4 \mathrm{~m} . \mathrm{s}^{-1}$. After the collision, if the two bodies stick together and move, they move with a common velocity
149170
Assertion (A): In an elastic collision of two billiard balls, both kinetic energy and linear momentum remain conserved.
Reason (R) During the collision of the balls, as the collision is elastic there is no exchange of energy. Therefore, both energy and momentum are conserved.
The correct option among the following is
149173 An object $\mathrm{A}$ of mass $20 \mathrm{~kg}$ and travelling at 20 $\mathrm{m} / \mathrm{s}$ crashes into another object $B$ of mass 200 $\mathrm{kg}$ and travelling at $10 \mathrm{~m} / \mathrm{s}$, in the same direction. After the collision, object $A$ bounces back in opposite direction at a speed of $10 \mathrm{~m} / \mathrm{s}$. The speed of the object $B$ after the collision is: