Q.
Momentum is the ability of imparting or tending to impart motion to other bodies. The total momentum of a system remains conserved if no external force is acting it. This is calculated by the formula, $\vec{ p }= m \vec{ v }$. Consider a situation where a cart carrying five boys is moving without friction due to inertia along a straight horizontal road, with a speed of $10\, m / s$. After travelling certain distance, a boy jumps from the cart with a speed of $2\, m / s$ with respect to the cart in opposite direction to it. Then, second boy jumps with the same speed w.r.t. the cart, but in a perpendicular direction to the cart. The mass of the cart is $100 \,kg$ and mass of each boy is $20\,kg$.
Which of the following statement is true?
Laws of Motion
Solution: