1. Homework Statement
my ans is lnx = (-1/y) + c
(-1/y) = lnx -c
y = -1/ (lnx -c ) , but the answer given is (-1/ln x )+ C , how to get the answer given ?
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3. The Attempt at a Solution
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why the shearing force acting on the object in the first diagram is in different direction , while in the second photo , it's in same direction ?
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3. The Attempt at a Solution
in my opinion , it should be in different direction , because the...
1. Homework Statement
how to know that the nozzle increases the velocity of water by 6 times? it's not given .... and no data for initial velocty given
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3. The Attempt at a Solution
1. Homework Statement
in this notes , i was told that the PV=mRT , why ? shouldn't PV= NRT , N=number of moles ? it should be PV = m/M (RT) , right ?
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3. The Attempt at a Solution
1. Homework Statement
for the alternative form of second shift property (4.8) , why he integral of (e^-sp) g(p+a) dp isn't equal to integral of (e^-sp) g(t) dp ? why it will become L{ g(t+a) } ?
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3. The Attempt at a Solution
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why we need to make x as absolute value ? as we can see, the original is x , why we we need to make x as absolute value ? is the working wrong ?
2. Homework Equations
3. The Attempt at a Solution
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pls refer to photo 2 , (circled part) How to transform equation in 3-20 to become equation in 3-22a ?
2. Homework Equations
3. The Attempt at a Solution
i have tried in photo 3 , yet can get the same form as in 3-22a . In step 2 , i divided the y_p with Fr
1. Homework Statement
in the second picturre, why the zs1 and zs2 is calculated by using 2m and 0.6m respectively ? it should be 0.8m , am i right ? what's the purpose of the author to use 2m and 0.6m ?
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3. The Attempt at a Solution
1. Homework Statement
Since this scanned notes is not clear enough , so I retype some parts of the notes,
The enthalphy , h is given by the formula , h = u +Pv = u + P/ ρ
I wanna ask about the total energy of the flowing fluid , which is given by the formula =
P/ ρ + e = h + ke +pe = h +...
1. Homework Statement
i couldn't understand why the pressure P1 is given by P atm - ρ water (gh2) - ρ(oil)(gh1) + ρ(mercury)(gh3) .Where is the point P1 ? It's not indicated in the diagram ...
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3. The Attempt at a Solution
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Why the weight of water at water surface is given by formula 2(pi)Rσ(cos angle) ?
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3. The Attempt at a Solution
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I'm asked to find whether the object is moving or not
in this question , i was given the solution like this , i am wondering why the tension from 100kg to the roller(up) and the tension from point B to roller doesnt cancel each other?
Total force acting down the slope...
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The block of 50kg with m =30kg is in the verge of moving down the slope where theta = 20degree, determine the new value of m when the mass of block is increased more to 20kg .
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3. The Attempt at a Solution
I have done in this way , is it okay ?
(50-30)(9.81) =...
1. Homework Statement
The block of weight of 100N is pulled by a rope over a pulley of small block with m kg . A 200N forec also acts horizontally as shown . If thge kinetic coefficient = 0.25 , static coefficient = 0.3 , determine whether the block is moving when the block is in moving or...
1. Homework Statement
i am asked to find the equivalent resultant force for this question . for the distributed load , i divided into 4 parts , is my method correct?
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3. The Attempt at a Solution
total force about y = 6sin30 + 3(3) + (5-3)(0.5)(3) + 5(4) +...
1. Homework Statement
why there is no constraint of plate about a axis ?
for moment about z -axis , i can have -2Bx +3By = 0 , where By and Bx = 0 which is shown in the top part of solution....
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3. The Attempt at a Solution
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why would we get 59N for FBa ? Isn't it equal to 50.6j +8.43k ?
they are j and k respectively , how could they sum up together? since dot product of j dot j is j , k dot k is k
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3. The Attempt at a Solution
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three small spheres, A , B and C with mass of 3kg , 4kg , 7kg respectively are arranged as shown in the figure. Initially , sphere B is placed in static condition,while the sphere A is moving with a velocity of 4u towards B and collides . Then , sphere C move to right with...
1. Homework Statement
two 50N are applied to the corner B and D , determine the moment of couple formed by the two forces by resolving each force into the horizontal and vertical component and adding the two resulting couples . Use the result to determine the perpendicular distance between the...
1. Homework Statement
Determine the tension cable A and B and the x , y , z reaction of the ball and socket joint at C .
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3. The Attempt at a Solution
I let the reaction of ball and socket joint at C = Fx , Fy and Fz
Sum of force in z direction :
TA +TB +FZ= 400
Sum...
in this notes , the author gave that the IG is the moment of inertia calculated about an axis which is perpendicular to the page .....
moment of inertia calculated about an axis which is perpendicular to the page here means id due to Ft(tangential force) only ? not include Fn ( normal force )...
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can someone tell me why the acceleration in n direction is 18ms^-2 ? i only understand that the centripetal acceleration = 18ms^-2
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3. The Attempt at a Solution
1. Homework Statement
Lets say i have a structure like this , at A and B are fixed support ( it resists moment about , force in x and y direction) I wanna find the moment about the A , should I include the MA as well in my calculation or no ?
2. Homework Equations
3. The Attempt at a...
1. Homework Statement
I'm asked to find the W and I was told that the rope at C is in tension , there is reaction at B , my question is , is there any reaction at C ?
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3. The Attempt at a Solution
1. Homework Statement
the total force acting downwards the plane = 100(9.81)sin20 + 150= 485.5 N , should I take the tension in B into consideration ? how to get the tension on the rope ?
2. Homework Equations
3. The Attempt at a Solution