A block of mass m is placed on a rough surface inclined relative to the horizontal. The incline angle is increased until the block start to move. Show that you can obtain the coefficient of statiC friction us by measuring the critical angle 8 where slipping occurs. mg pinto Solution lock still at rest, so the net force on the x-axis is: Just before slipping, we say that -f EFx=mg Evaluating, we get = mg frictional

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Remaining Time: 52 minutes, 33 seconds.
Question Completion Status:
But the frictional force is expressed as the product of coefficient and the normal force so.
Ps
= mg
For an inclined plane. The normal force is
n=mg
Then,
cos(0)
Ps=mg
SO:
tan(e)
Ps=
QUESTION 5
(COLLAB) A new design of Saturn 13 rocket with mass 1.64 x10° kg has a propulsion engine that can eject gases at a constant speed of 269
kg.
kg/s (dmdT). In full tank, the rocket can carry a fuel of mass 43.97 x10
If this design exceeds the velocity of 11,200 m/s it can successfully escape Earth's gravity. Determine if this is so. Find its maximum velocity
0)
QUESTION 6
Juan, Jose, and Jokoy are pushing a table with a constant 515 N force. Juan is pushing the table eastward while Jose is pushing northward.
table moves 7 meters along east, how many joules of total work are exerted by the three men. Input the value only: do not include the units.
Transcribed Image Text:Remaining Time: 52 minutes, 33 seconds. Question Completion Status: But the frictional force is expressed as the product of coefficient and the normal force so. Ps = mg For an inclined plane. The normal force is n=mg Then, cos(0) Ps=mg SO: tan(e) Ps= QUESTION 5 (COLLAB) A new design of Saturn 13 rocket with mass 1.64 x10° kg has a propulsion engine that can eject gases at a constant speed of 269 kg. kg/s (dmdT). In full tank, the rocket can carry a fuel of mass 43.97 x10 If this design exceeds the velocity of 11,200 m/s it can successfully escape Earth's gravity. Determine if this is so. Find its maximum velocity 0) QUESTION 6 Juan, Jose, and Jokoy are pushing a table with a constant 515 N force. Juan is pushing the table eastward while Jose is pushing northward. table moves 7 meters along east, how many joules of total work are exerted by the three men. Input the value only: do not include the units.
Remaining fime: 35
* Question Completion Status:
A block of mass m is placed on a rough surface inclined relative to the horizontal. The incline angle is increased until the block start to move, Show that you can obtain the coefficient of static
friction us by measuring the critical angle e where slipping occurs.
tf
Solution
Just before slipping, we say that the block is still at rest, so the net force on the x-axis is:
EFx=mg
-f
Evaluating, we get
= mg
But the frictional force is expressed as the product of coefficient and the normal force so.
Click Save and Submit to save and submit. Click Save All Answers to save all ansuers.
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Transcribed Image Text:Remaining fime: 35 * Question Completion Status: A block of mass m is placed on a rough surface inclined relative to the horizontal. The incline angle is increased until the block start to move, Show that you can obtain the coefficient of static friction us by measuring the critical angle e where slipping occurs. tf Solution Just before slipping, we say that the block is still at rest, so the net force on the x-axis is: EFx=mg -f Evaluating, we get = mg But the frictional force is expressed as the product of coefficient and the normal force so. Click Save and Submit to save and submit. Click Save All Answers to save all ansuers. P Type here to search to -. . ..
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