Question

Two objects A and B are placed into free fall $14.7m$ above the ground at exactly the same time. Object A reaches the ground in exactly $1$ second, and object B reaches the ground in exactly $3$ seconds. Which of the following is/are true?
I. Object B was thrown horizontally.
II. Both objects were thrown.
III. Neither object was thrown

• A. I only
• B. II only
• C. I and III only
• D. II and III only
• E. I, II, and III

Answer 1

The correct option is A I only

Since it takes longer time for object B to reach the ground, the object B must have vertical component of speed as zero. Hence it must be thrown horizontally.