Question

A person sitting at the rear end of the compartment throws a ball towards the front end. The ball follows a parabolic path. The train is moving with uniform velocity of $20m{s}^{-1}$. A person standing outside on the ground also observes the ball. How will the maximum heights $\left(h_m\right)$ attained and the ranges $\left(R\right)$ seen by the thrower and the outside observer compare with each other?

• A. Same $h_m$ , different $R$
• B. Same $h_m$ and $R$
• C. Different $h_m$, same $R$
• D. Different $h_m$ and $R$

Answer 1

The correct option is A Same $h_m$ , different $R$

The motion of the train will affect only the horizontal component of the velocity of the ball. Since, vertical component is same for both observers, $h_m$ will be the same, but $R$ will be different.