A 2.00-kg box is moving to the right with speed 9.00 m>s on a horizontal, frictionless surface. At t = 0 a horizontal force is applied to the box. The force is directed to the left and has magnitude F1t2 = 16.00 N>s 2 2t 2 . (a) What distance does the box move from its position at t = 0 before its speed is reduced to zero? (b) If the force continues to be applied, what is the speed of the box at t = 3.00 s?
53. Light of wavelength is normally incident on some plane optical device. The intensity pattern shown is observed on a distant screen (θ is the angle measured from the normal of the device). The device could be: intensity . . . ... .. .. . . .. .. . . .. ..