Respuesta :

JohnLayton
P = m * v
v = {3i - 4j} = square root (3^2 + 4^2) = 5
P = 20 * 5
P = 100 kg m/s
AL2006

Magnitude:

√(3² + 4²) = √(9 + 16) = √25  =  5

Momentum = (mass) x (velocity)  =  (20kg x 5m/s) =  100 kg-m/s


Direction:

3i - 4j is in the direction  tan⁻¹(-4/3)  =  53.1 south of east.

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good job