[bero]

1-F=ma , F=1/2 W, W=mg

v=x/t


from all these we get:

a=1/2 g =9.8/2


; a=v/t

F:force, W:waight, m: mass, a:acceleration, g: gravity acceleration, v: velocity, t: time, x:displacement





2- W= F. x cos(theta) =(30)(40) cos (60)

W:work, F: fource, x: displacement