The figure above shows two industrial spies sliding an initially stationary 225 kg floor safe a displacement d⃗ of magnitude 8.50 m. The push F⃗1 of Spy 001 is 12.0 N at an angle of 30.0◦ downward from the horizontal; the pull F⃗2 of Spy 002 is 10.0 N at 40.0◦ above the horizontal. The magnitudes and directions of these forces do not change as the safe moves, and the floor and safe make frictionless contact. (a)  What is the net work done on the safe by forces F⃗1 and F⃗2 during the displacementd⃗? (b)  During the displacement, what is the work Wg done on the safe by the gravitational force F⃗g, and what is the work WN done on the safe by the normal force F⃗N from the floor? (c)  The safe is initially stationary. What is its speed vf at the end of the 8.50 m displace- ment?

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Q: mass

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: