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(observar imagen adjunta)
→ → →
• Fr = F + P = 4i - (0.3kg)(10m/s)j [N]
= 4i - 3j [N]
= (4, -3) [N]
→
• d = 2.5i -1.5j [m] = (2.5 , -1.5) [m]
Entonces:
W = (4,-3)(2.5, -1.5) N.m
W = 4(2.5) + (-3)(-1.5) [J]
W = 10 + 4.5 [J]
W = 14.5 Joules
Eso es todo! Saludos :)
Jeyson(Jmg)