Recent content by red1312

thanks :)

Homework Statement how to find this Homework Equations none The Attempt at a Solution determinant??

Thank you very much I understood the first part But sorry I didn't get it the last part which is the 1/2 ,,, Thank you again

Hi I hope this the right place to put my question I didn't understand how it became like this Thank you

1. Homework Statement In the picture Homework Equations In the picture The Attempt at a Solution In the picture My question is .. Why in Fx has sin and Fy has cos ?

Thank you so much !

Okey (a) F=ma 18=8a a=2.25 v^2=v0^2+2ax x= 32m (b) W=Fd = 18(32) = 576 J (c) KE= 1/2 mv^2 = 8(144)/2 = 576 J

x= 32 m W= 576 J KE = still 48 J Am I right ??

Oh right to find a Can I use F=ma

Well that is the problem ,,, I just use g instead of a

Homework Statement A body of mass 8.0 kg is initially at rest on a horizontal frictionless surface. A force of 18 N acts on it and accelerates it to a final velocity of 12 m/s. Calculate (a) the distance travelled, (b) the work done by the force, (c) the final KE of the body...

Ooh so the time will be 0.49 s Sorry

Yeah ..I just solve it thank so much First we find the velocity from this formula v=at Then we apply to find the time that it take to hit the ground which from this formula y=y0+v0y(t)+(1/2)gt^2 Finally we just multiply between the velocity from the answer 1 (6.5) and time 0.16 Is it right ??

Which formula for both parts ?

Homework Statement A girl shoves a book at rest on a table and it moves with an acceleration of 1.3 m/s . After 5 s, the book falls at the edge of the table. If the table height is 1.2 m, find the horizontal distance that it hit the floor. (ans: 3.22 m) ... How the answer would be 3.22...