Recent content by jake jungle

Homework Statement The variation of the force F with the time t acting on a body of mass 200g is as shown in the graph below Given that the velocity of the body at t=75ms is 15m/s . What is the velocity of the body at t=150ms A.15m/s B.30m/s C.35m/s D.39m/s Homework Equations F = m Δv/Δt The...

sr i didnt understand , since S = 1/2 at^2 then if Δx=2Δy . then ax should be equal 2 ay ? then a2 = 2a1 ?

That's where i was confused. If m2 goes a distance of x. Will m1 goes a distance of x/2 or 2x?

sorry i don't get it . can you be more specific , and which answer do you choose :D

Homework Statement What is the relationship between a1 and a2 A.a1=a2 B.a1=2a2 C.a2=2a1 D.a1=a2√2 E.a2=a1√2 F.There is no simple relationship between the two acceleration Homework Equations a = F/m The Attempt at a Solution I am quite confused with the second pulley , so the weight of m2 is...

KE= mv^2 / 2 = mgh =PE . mass is omitted in the equation , therefore you can find h . the acceleration = F / m , you should find which component of gravity actually makes the mass running down the slope , then divide m , you got acceleration

KE at bottom should be equal to PE on the top of the slope

Homework Statement Find the pd accros C2 Homework Equations Q=CV The Attempt at a Solution i find C23 = (C2C3)/ (C2 + C3) then find Q23 = V x C23 Q23 = Q2 = C2V2 => V2 i used this and got V2 = 15V , however the answer is 20V , and i even didnt use the data of C1 . am i wrong somewhere ?

OK I got it , thanks a lot

the direction of i2 and i3 quite confusing so i reveresed the direction of i2 to apply KVL more easily , therefore i got these equations : i1(2+4) +3i3 - 24 = 0 (KVL) i2(5+1) + 3i3 +12 = 0 (KVL) i3 = i1 + i2 (KCL) and i got right answer i1 = 3.5A , i2 = -2.5A (due to reversing the direction )...

so i do it like this : I1(2+4) +3I3 - 24 = 0 (KVL) I2(5+1) + 3I3 - 12 = 0 (KVL) I1 = I2 + I3 (KCL) and i solve this and got I1 = 3 A , I2 = 1A , I3 = 2A Am i wrong somewhere cause the answer should be I1=3.5A and I2 =2.5A instead

Homework Statement Find I1 , I2 and I3 Homework Equations I = E / R I3 = I1 - I2 The Attempt at a Solution its the trouble with parallel different emf . I know a formula how to combine them into one but it needs inner resistance . i don't know how to do it with the ideal circuit . The...