Question

Two particles of equal mass m are projected from the ground with speeds $v_1$ and $v_2$ at angles ${\theta }_1$ and ${\theta }_2$ as shown in the figure. Given ${\theta }_2>{\theta }_1$ and $v_{1}cos{\theta }_1=v_{2}cos{\theta }_2$. Which statement/s is/are correct?

• A. Centre of mass of particles will move along a vertical line.
• B. Centre of mass of particles will move along a line inclined at some angle with vertical.
• C. Particle '1' will be above centre of mass level when both particles are in air.
• D. Particle '2' will be above centre of mass level when both particles are in air.

Answer 1

Answer: (A), (D)

The correct options are
A Centre of mass of particles will move along a vertical line.
D Particle '2' will be above centre of mass level when both particles are in air.