Physics 1st Paper CQ-Mymensingh Board-2022

1. One day Salim and Murad stand on a place. At that time, velocity of air is $5 \mathrm{~ms}^{-1}$ in the direction from south to North. This time, rain falls down with velocity $3 \mathrm{~ms}^{-1}$. After starting rain, Salim moves from south to north and Murad moves from North to South with velocity $7 \mathrm{~ms}^{-1}$.

2. A train derailed and overtumed while taking a turns of radius $328 \mathrm{~m}$ when it's velocity is 60 is $\mathrm{kmh}^{-9}$. Distance between the rail path is $1 \mathrm{~m}$ in the accident place and the outside path is $7 \mathrm{~cm}$ high compare to the inside path.

3. Rafid vibrating a object of mass $0.2 \mathrm{~kg}$ by the figures.

4. In a three dimentional coordinate system two points are $P(1,2,1)$ and $Q(2,1,1)$ respectively. Positional vectors of these two points are $\overrightarrow{O P}$ and $\overrightarrow{O Q}$. Draw a parallelogram by holding the adjacent arm by the position vectors then the coordinate of the points $R$ is $R(1,1,2)$.

5. Bangabandhu satellite is placed at a height of $3.6 \times 10^{4}$ $\mathrm{km}$ from the surface of the earth. It is set to expand the game of U-19 World Cup Cricket. Radius of the earth $R=$ $6.4 \times 10^{6} \mathrm{~m}$.