Resposta:
a) F=m.a
[tex] a = \frac{ f}{m} \\ a = \frac{50}{2.5} \\ a = 20{ms}^{2} [/tex]
[tex] {v}^{2} = {vo}^{2} + 2.a.x \\ {v}^{2} = 2.20.3 \\ v = \sqrt{120 } \\ v = 10.9ms[/tex]
b)
[tex]w = f.x.cos \alpha \\ w = 50.3. \frac{ \sqrt{3} }{2} \\ w = 150. \frac{ \sqrt{ 3} }{2} \\ w = 75 \sqrt{3} [/tex]
