ch05-p078 - 78. With SI units understood, the net force on...

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78. With SI units understood, the net force on the box is () ( ) net ˆˆ 3.0 14 cos 30 11 i 14 sin30 5.0 17 j F =+ ° −+ ° + G which yields net (4.1 N)i (5.0 N)j F =− G . (a) Newton’s second law applied to the m = 4.0 kg box leads to 22 (1.0 m/ s )i (1.3 m/ s ) j . F a m == G G (b) The magnitude of
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