a. Mark the follllowing statements as true offalse.
i. A ball thrown vertically up takes moretime to go up than to come down.
ii. If a ball starts fallig from the position of rest, then it travels a distance of `25 m` during the third secons of tis fall.
iii. A packet dropped from a rising balloon ferst moves upwards and then moves sownward as observed by a stationary observer on the ground.
iv. In the absence of air resistance, all bodies fall on the surface of earth at the same rate.
b. Fill in the blanks.
i. When a body is thrown vertically upwards, at the highest point.........................(both belocity and accelenation are zero//only velocity is zero//ony acceleration is zero). ii. If air drag is not neglected, then which is greater: time of ascent or time of descent?
iiii. A body is projected upward. Up to the maximum height time taken will be greater to travel...................... (first half//second half).

Explanation

### Step-by-Step Solution

**Part a: Mark the following statements as true or false.**

1. **Statement:** A ball thrown vertically up takes more time to go up than to come down.
- **Analysis:** When a ball is thrown vertically upwards, it takes time \( t_1 \) to reach the highest point and time \( t_2 \) to come down. The time taken to go up is equal to the time taken to come down because the motion is symmetric. Thus, \( t_1 = t_2 \).
- **Conclusion:** **False**

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