Question #1:
A clam dropped by a sea gull takes 3.0 seconds to hit the ground. What is the sea gull's approximate height above the ground at the time the clam was dropped?
Question #2:
An object is allowed to fall freely near the surface of a planet. The object falls 54 meters in the first 3.0 seconds after it is released. What is the acceleration due to gravity on that planet?
need help in 2 physics questions asap?
2007-03-25 3:02 am
回答 (5)
2007-03-25 3:09 am
✔ 最佳答案
1) y = y_0 + v_0t + (1/2)a t^2y = 0, v_0 = 0, a = -9.81 m/s^2, t = 3, we're solving for y_0
Rearrange the equation:
y_0 = (1/2)(9.81)(3^2) = 44.145 meters.
2) Using the same equation as the last one.
y = 0, y_0 = 54 meters, t = 3, v_0 = 0, we're solving for a
0 = 54 + (1/2)a(3^2)
Rearrange.
-54(2)/9 = a = -12 m/s^2
2007-03-25 4:37 am
Q#1:
formula: Newtons Law
Distance = (1/2)gt^2 , known t=3.0 secs.
where s = distance
g = gravitational acceleration = 9.81 m/s^2
t = time = seconds
Solve for Distance: s = (1/2)(9.81 m/s^2)(3.0 secs)^2
s = 44.145 meters
formula: Newtons Law
Distance = (1/2)gt^2 , known t=3.0 secs.
where s = distance
g = gravitational acceleration = 9.81 m/s^2
t = time = seconds
Solve for Distance: s = (1/2)(9.81 m/s^2)(3.0 secs)^2
s = 44.145 meters
2016-10-20 9:44 pm
Hitler grew to become right into a guy or woman who grew to become into before no physique. He slowly and slowly entered in political area and had great oratory skills. quickly he overthrew the present government and grew to alter right into a dictator of Germany. His rules have been very obligatory as you will possibly desire to have studied in SST e book 9th extensive-unfold CBSE .That info is sweet adequate on your assessments
2007-03-25 3:14 am
Apply s = ut + 1/2 * a * t^2 for both questions. s = height released, u=0 is the initial vel, a is the accel due to gravity, and t is the time of flight. For question 1, a=g is given, use t to solve s. For question 2, a is unknown but s and t are given.
2007-03-25 3:11 am
2*height = a*t^2
Just plug in the data. works for both problems.
Just plug in the data. works for both problems.
收錄日期: 2021-05-03 05:09:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070324190230AAKSDyK