please explain this to me Pushing a Chair along the Floor Part A A chair of weig

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please explain this to me

Pushing a Chair along the Floor Part A A chair of weight 115 N lies atop a horizontal floor the floor is not frictionless, You push on the chair with a force of F 380 N directed at an angle of 40.0 °below the horizontal and the chair slides along the floor. Using Newton's laws, calculate n, the magnitude of the normal force that the floor exerts on the chair Express your answer in newtons * Hints Submit My Answers Give Up Incorrect; Try Again; 4 attempts remaining Continue

Explanation / Answer

weight W = 115 N

force F = 38 N

angle = 40 degrees

Magnitude of normal force n = W + F sin

Put values

                                            = 115 + ( 38 sin 40 )

                                            = 139.44 N Answer

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