question_answer

A ball is thrown upwards with some initial speed. It goes up to a height: of 19.6 m and then returns. If initial, speed of the ball is P, Q is the time taken to reach the highest point after throw, R is the velocity of the ball one second before it reaches the maximum height and S is the time taken by the ball to return to its original position after throw, then which of the following options is correct for P, Q, R and S?

A) \[P-19.6\text{ }m/s,\text{ }Q-3\text{ }s,\text{ }R-9.8\text{ }m/s,\text{ }S-4\text{ }s\]

B) \[P-9.8\text{ }m/s,Q-1.5\text{ }s,\text{ }R-9.8\text{ }m/s,S-3\text{ }s\]

C) \[P-19.6\text{ }m/s,Q-2\text{ }s,\text{ }R-19.6\text{ }m/s,S-4\text{ }s\]

D) \[P-19.6\text{ }m/s,Q-2\text{ }s,\text{ }R-9.8\text{ }m/s,S-4\text{ }s\]

E) None of these