Gravitation Question 4
Question: An iron ball and a wooden ball of the same radius are released from a height h in vacuum. The time taken by both of them to reach the ground is [NCERT 1975; AFMC 1998]
Options:
A) Unequal
B) Exactly equal
C) Roughly equal
D) Zero
Show Answer
Answer:
Correct Answer: B
Solution:
Time of decent$ [t=\sqrt{\frac{2h}{g}}] $ . In vacuum no other force works except gravity so time period will be exactly equal.
