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Q. When an 87kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.20 x 10^3 J. By how much does potential energy of a 23kg child increase while the child climbs a normal staircase to the second floor?

Q. A force vector has a magnitude of 594 newtons and points at an angle 37o of below the positive x axis. What are (1) the x scalar component and (2) the y scalar component of the vector?

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