NEET Physics Laws of Motion Law Of Conservation Of Linear Momentum MCQs

A particle of mass $m_1$ moving with velocity $v_1$ collides elastically with a stationary particle of mass $m_2$. After the collision, $m_1$ moves with velocity $v'_1$ at an angle $heta$ to the initial direction. If $m_2 = 2m_1$, and $v'_1 = \frac{v_1}{\sqrt{3}}$, what is $heta$?

A rocket in space ejects gas at a constant rate $\mu$ kg/s with a constant speed $v_e$ relative to the rocket. If the initial mass of the rocket is $M_0$, what is its velocity after time $t$?

Two identical balls of clay, each with mass $m$ and speed $v$, collide head-on and stick together. What is the magnitude of the impulse experienced by each ball?

A ball of mass $m$ moving with velocity $v$ strikes a wall at an angle $heta$ and rebounds with the same speed at the same angle. If the collision time is $\Delta t$, what is the average force exerted by the wall on the ball?

A man of mass $M$ standing on a frictionless surface throws a ball of mass $m$ with a velocity $v$ at an angle $heta$ with the horizontal. The velocity of the man after he throws the ball is:

A shell explodes into three fragments of equal masses. Two fragments fly with equal speeds $v$ in mutually perpendicular directions. What is the speed of the third fragment?

A 2 kg ball moving at 4 m/s collides elastically with a stationary 1 kg ball. What is the velocity of the 1 kg ball after the collision?

A bomb at rest explodes into three fragments of equal mass. Two fragments fly off at right angles to each other with speeds of 9 m/s and 12 m/s respectively. What is the speed of the third fragment?

A gun of mass 5 kg fires a bullet of mass 50 g with a velocity of 200 m/s. What is the recoil velocity of the gun?

A boy of mass 50 kg is standing on a frictionless surface. He throws a ball of mass 0.5 kg horizontally with a speed of 10 m/s. What is his recoil speed?