Physics Question. Pls help me out.?
3) PHYSICS Short Answer Consider a planet where g equals 5.0 meters per second squared. Ignoring friction, if an object started from rest, how far would it fall vertically off a cliff in 4.0 seconds, giving your answer in standard SI units?
ANSWER: 40 METERS (must give units)
(Solution: d = ½ × at2 = ½ × 5× 42 = 40 meters)
Pls explain to me how this works. BTW i am an eight grader and dont kno anything about this stuff yet.
- SwamyLv 71 decade agoFavorite Answer
d = ut + 1/2 a t^2 where u is the initial velocity and a the acceleration. in our case u is zero and a = 5 m/s^2
d = 5/2 x 4 x 4 = 80 / 2 = 40 m
- billrussell42Lv 71 decade ago
If you don't know anything about this, how do you expect to understand the answer?
Your answer has the formula as well as the arithmetic. There is nothing to add. Except your arithmetic is faulty.
d = ½ at² = ½ × 5 x 4² = ½ × 5 x 16 = 40 m
- murrahLv 44 years ago
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