Question
In: Physics
An apple falls from a tree and feels no air resistance. As it is falling, which...
An apple falls from a tree and feels no air resistance. As it is falling, which of the following statement is correct?
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The apple’s momentum and apple-Earth mechanical energy are conserved. |
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Its kinetic energy is conserved |
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The apple’s momentum is conserved. |
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The mechanical energy of the apple-Earth system is conserved. |
Solutions
genius_generous answered 2 years agoRelated Solutions
An apple drops from the tree and falls freely. The apple is originally at rest a...
An
apple drops from the tree and falls freely. The apple is originally
at rest a height H0 above the ground. The ground is covered with a
thick lawn, which is made of blades of grass of height h. When the
apple enters the grass, it slows down at a constant rate so that
its speed is 0 when it reaches ground level.
A. Find the speed of the apple just before it enters the
grass.
B. Find the acceleration...
In the absence of air resistance, a projectile that lands at the elevation from which it...
In the absence of air resistance, a projectile that lands at the
elevation from which it was launched achieves maximum range when
launched at a 45?angle. Suppose a projectile of mass m is
launched with speed v0 into a headwind that exerts a
constant, horizontal retarding force F?
wind=?Fwindi^.
By what percentage is the maximum range of a 0.900 kg ball
reduced if Fwind =0.600 N ?
Express your answer with the appropriate units.
*Answer cannot be 7.25 %, 6.8%,...
In the absence of air resistance, a projectile that lands at the elevation from which it...
In the absence of air resistance, a projectile that lands at the
elevation from which it was launched achieves maximum range when
launched at a 45∘ angle. Suppose a projectile of mass m is launched
with speed v0 into a headwind that exerts a constant, horizontal
retarding force F⃗ wind =−Fwindi^.
By what percentage is the maximum range of a 0.600 kg ball
reduced if Fwind = 0.100 N ?
Express your answer with the appropriate units.
Falling Drop A raindrop of mass mo, starting from rest, falls under the influence of...
4. Falling Drop A raindrop of mass \(m_{0}\), starting from rest, falls under the influence of gravity. Assume that as the raindrop travels through the clouds, it gains mass at a rate proportional to the momentum of the raindrop, \(\frac{d m_{r}}{d t}=k m_{r} v_{r}\), where \(m_{r}\) is the instantaneous mass of the raindrop, \(v_{r}\) is the instantaneous velocity of the raindrop, and \(k\) is a constant with unit \(\left[m^{-1}\right] .\) You may neglect air resistance.(a) Derive a differential equation for the...
In this lab, an apple is released from rest and falls freely until it lands in...
In this lab, an apple is released from rest and falls freely
until it lands in a bowl. Watch the video here. We will be
measuring y (the vertical position coordinate) as a function of
time t. Notation: y0 is the value of y at t = 0; vy is the
y-component of the velocity; vy0 is the value of vy at t = 0; ay is
the y-component of the acceleration. The +y-direction is up.
Assuming air resistance is...
In this lab, an apple is released from rest and falls freely until it lands in...
In this lab, an apple is released from rest and falls freely
until it lands in a bowl. Watch the video here. We will be
measuring y (the vertical position coordinate) as a
function of time t.
Notation: y0 is the value of y at
t = 0; vy is the y-component
of the velocity; vy0 is the value of
vy at t = 0; ay is
the y-component of the acceleration. The
+y-direction is up.
Assuming air resistance is...
A 540-g squirrel with a surface area of 875 cm2 falls from a 5.2-m tree to...
A 540-g squirrel with a surface area of 875 cm2 falls
from a 5.2-m tree to the ground. Estimate its terminal velocity.
(Use the drag coefficient for a horizontal skydiver. Assume that
the squirrel can be approximated as a rectanglar prism with
cross-sectional area of width 11.2 cm and length 22.4 cm. Note, the
squirrel may not reach terminal velocity by the time it hits the
ground. Give the squirrel's terminal velocity, not it's velocity as
it hits the ground.)...
A conducting rectangular loop of mass, M, resistance R, and dimensions w x l falls from...
A conducting rectangular loop of mass, M, resistance R, and
dimensions w x l falls from rest into a magnetic field B. During
the time interval before the top edge of the loop reaches the
field, the loop approaches a terminal speed vt . Show
that vt=MgR/B2w2
a)derive the equation of motion of a bouncing ball dropped from rest (with air resistance )...
a)derive the equation of motion of a bouncing ball dropped from
rest (with air resistance )
b) trajectory-- time it take to stop
step by step please .
When the economy is in recession, government revenue falls due to a falling tax base. Therefore...
When the economy is in recession, government revenue falls due
to a falling tax base. Therefore the proper role of government
should be to increase taxes and cut spending so as to balance the
Federal budget. Do you agree? Why?
“Money not backed by gold or silver is worthless paper and is a
fraud committed against the people of the United States.”
Critically evaluate this statement.
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