Recent content by naada

Presumably a 20 degree incline? the question didn't mention the word "degree" or " ْ " it's exactly as I wrote it . So I toke 20 as the slop # x=? vi=5 vf=0 a=? F = ma (m g cos20 = m a) / m 9.8 cos20 = a a=9.21 x=25/(2a) x=25/(18.42) x=1.37 m Which is also wrong # 180 = 90+20+...

Homework Statement A box is given an initial velocity of 5m/s up a smooth 20 incline surface . The distance the box travel before coming to rest is? Homework Equations I can't solve it correctly , I can't get the idea of this question The Attempt at a Solution x= ? vi=5 v=0...

This is the way i did it a- Car 1 N-F= ma N - mg = ma N= mg+ma N= 3*9.8 + 3*9.8 = 29.4 + 29.4 =58.8 Car 2 The same way so its N =19.6 b- F-T = m a F= mg= 3+1 * 9.8 = 39.2 so 39.2 - T = 1+3 * a -T = -39.2 +4*a a=? I COULDN'T FIGURE OUT HOW TO FIND THE ACCELERATION.! PLZ...

A child pulls a train of 2 cars with a horizontal force F of 10N . Car1 has a mass of m1=3kg, and car2 has a mass of 1kg The mass of the string connecting the the cars is small enough to be set equal to zero, and the friction can be neglected . a- Find the normal force exerted on each car...