Question

Pg.3 51. The position function of a particle moving along an x- axis is given by )4.Se+10+2: where x is measured in meters and t in seconds. a) Where is the particle located at exactly 1s? 5) What is the magnitude of the velocity at 1.5s? ) At what time, if ever, does the particle (momentarily) stop? d) Where is the particle at the time it stops? e) When, if ever, is its acceleration zero? 6] An Airplane whose ground speed in still air is v-325mi/hr.i, flying with its nose pointed due East. If there is a cross wind given by the vector u-18i+24 j a) What is the magnitude of the speed of the airplane? b) In what direction relative to the East must it now sail to reach its original destination?

Answer 1

2 こ16.167 -2.25 +22. - 21.25 ms

3 -3333333 + 150 ナ100 +2. lon eness win 1824

2. AJ (as 1 + 241 t (24)2 | 11孔924 576 11 22 ,3 43.8381 тућ 0 neac and 18 neach its σ。iginal direction net z 325 (181424 -24 3 07 grol