Почему пассажир в автобусе при резком торможении па рёд?

6. A particle undergoes three consecutive displacements: \( \bar{d}_{1}=(15 i+30 j+12 k) \mathrm{cm} \). \( \vec{d}_{2}=(23 i-14 j-5 k) a n \) and \( \vec{d}_{3}=(-13 i+15 j) \) an Find the magnitude of the resultant displacement.

A bullet of mass 120 grams is fired into a target of mass 10 kg with velocity \( 400 \mathrm{~m} / \mathrm{s} \). If the target is free to move, the loss of kinetic energy would be approximately \( \begin{array}{ll}\text { (1) } 9.5 \mathrm{kNm} & \text { (2) } 4.75 \mathrm{kNm} \\ \text { (3) } 19 \mathrm{kNm} & \text { (4) } 0\end{array} \)

15 Una matita cade inavvertitamente dal davanza- le di una finestra del terzo piano. Dopo mezzo secondo dal lancio, la matita ha percorso: (a) 1 m circa (b) 15 m circa (c) \( 2,5 \mathrm{~m} \) (d) uno spazio direttamente proporzionale allaltez- za da cui è caduta (e) uno spazio inversamente proporzionale all'al- tezza da cui è caduta

If the component vector \( \vec{A} \) along the direction of vector \( \vec{B} \) is zero, what can you conclude abot the vectors? a) Is it possible to add a vector quantity to a scalar quantity? Explain b) Can the magnitude of a vector have a negative value? Explain Which of the following physical quantities are vector \& which are not: force, temperature, th volume of water in a can, the ratings of a TV show, the height of a building, the velocity of

Условие заданИя: точка, совершающая механические колебания, проходит за 2 полных колебания путь, равный 62 см. Определи амплитуду колебаний точки. (Ответ окрудлидо челых.)