A body of mass 1500g is dropped from 20m high tower. It will reach the ground
in:
A. 6.5 seconds B. 5.0 seconds
C. 3.5 seconds D. 2.0 seconds
Answers
Answered by
11
Answer:
c) 3.5seconds is a valid statement of the program user-friendly I am absent for today because illness and I have to go to the gym and then I will bee in the solution leaving the absorber I am absent for today because illness and I have to
Answered by
108
Answer:
The body will reach the ground in 2 seconds.
Explanation:
Mass of the body = 1500 g = 1.5 Kg
Height of the tower, S = 20 m
Initial velocity of the body, u = 0 m/s
Acceleration due to gravity, g = 9.8 m/s²
v² = u² + 2aS
v² = 0² + (2 × 9.8 × 20)
v² = 392
∴ v = √392 = 19.8 m/s
From the 1st equation of motion,
v = u + at
⇒ t = (v - u) / a
t = (19.8 - 0) / 9.8
t = 2.02 ≈ 2 sec
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