QUESTION-2 \( (\mathbf{2 0} \%) \) Three masses of \( 3 \mathrm{~kg}, 1 \mathrm{~kg} \) and 850 grams are placed on \( (1,3,5) \mathrm{m},(2,0,4) \mathrm{m} \) and \( (0,2,1) \mathrm{m} \) respectively. Find the new center of the mass of the system of the particles as coordinate points on Cartesian Coordinates.

1.Лифтінің жоғары көтеріле бастау сәтіндегі үдеу модулінің мәні \( 0,2 \mathrm{~m} / \mathrm{c}^{2} \) болса, осы кездегі массасы 50 ки баланың лифтідегі салмағы қандай?

6. A train moving at uniform speed takes 20 secs. to pass a cyclist riding at \( 11 \mathrm{~km} / \mathrm{hr} \) in the same direction as train but takes only 9 secs. to pass a post. What is the length of the train? \( \begin{array}{llll}\text { 1) } 50 \mathrm{~m} & \text { 2) } 60 \mathrm{~m} & \text { 3) } 70 \mathrm{~m} & \text { 4) } 80 \mathrm{~m}\end{array} \)

4.Жердің жасанды серіктерінің қозғалысы қозғалыстың қандай түріне жатады.?

7. A train overtakes 2 persons walking \( 2 \mathrm{~km} / \mathrm{hr} \) and \( 4 \mathrm{~km} / \mathrm{hr} \) respectively in the same direction and completely passes them in 9 seconds and 10 seconds. What is the speed of the trains in \( \mathrm{km} / \mathrm{hr} \) ? \( \begin{array}{llll}\text { 1) } 13.2 & \text { 2) } 17.6 & \text { 3) } 22 & \text { 4) } 26.4\end{array} \)

7. A train overtakes 2 persons walking \( 2 \mathrm{~km} / \mathrm{hr} \) and \( 4 \mathrm{~km} / \mathrm{hr} \) respectively in the same direction an completely passes them in 9 seconds and 10 seconds. What is the speed of the trains in \( \mathrm{km} / \mathrm{hr} \) ? \( \begin{array}{llll}\text { 1) } 13.2 & \text { 2) } 17.6 & \text { 3) } 22 & \text { 4) } 26.4\end{array} \)