Answer:
<em>The vertical acceleration is -9.81 m/s^2</em>
Explanation:
When a body is projected, the body experiences an acceleration in the vertical axis that is proportional to the acceleration due to gravity of the earth, which is equal to 9.81 m/s^2. In this case, the acceleration acts to stop the vertical motion of the paper plane, and hence is a deceleration, which explains the negative vertical acceleration.
Objects that are free to move "fall" towards the center of the Earth because of
the gravitational forces that attract the Earth and the object toward each other.
An object on or near the surface of the Earth that has only the force of gravity
and no other forces acting on it accelerates steadily toward the center of the
Earth at the rate of 9.81 meters per second every second.
At the same time, of course, the Earth accelerates toward the object, although
at a considerably lower rate.
Answer:
v = 2.31 m/s
Explanation:
Kinetic energy will be converted partially into potential energy and rest will remain in the form of kinetic energy .
Initial kinetic energy = 1/2 mu²
u is initial velocity at the bottom .
Potential energy at the top
= mgh
Kinetic energy at the top
= 1/2 m v²
According to conservation of energy
1/2 mu² = mgh + 1/2 m v²
1/2 u² = gh + 1/2 v²
.5 x 4.5² = 9.8 x .76 + .5 v²
10.125 = 7.448 + .5 x v²
v = 2.31 m/s
In one of the most stunning of all coincidences in Science,
the part of the electromagnetic spectrum that can be seen
by the human eye is labeled the "visible" spectrum.
Answer:
Radius of the outer most dark fringe is 2.65 cm
Solution:
As per the question:
Radius of curvature of the glass, r = 10.8 m
No. of dark fringes, n = 100
Wavelength of light,
Now,
To calculate the radius R of the outermost ring:
Radius of the dark fringe of nth order is given by: