Question 4
MotionIn free fall, a body of mass 1 kg drops from a height of 125 m from rest in 5 s. How long will it take another body of mass 2 kg to fall from rest from the same height? [g = 10 m s−2]
- A.5 s
- B.10 s
- C.12 s
- D.15 s
Show the answer and explanation
Answer: A (5 s)
Explanation
In free fall every body has the same acceleration g whatever its mass, so it also takes 5 s.