Physics 1st Paper MCQ-Barishal Board-2022

1. Observe the following stem and answer the questions no. 7 and 8 :

A mango of $200 \mathrm{gm}$ fall down from $15 \mathrm{~m}$ height of a mango tree and penetrated 10 $\mathrm{cm}$ in the mud.$\left[\mathrm{g}=9.8 \mathrm{~ms}^{-2}\right]$

2. What is the relation among the torque $(r)$, moment of inertia (l) and angular acceleration ($\alpha$)?

3. Scalar product of vectors obey the-

i. commutative law

ii. distributed law

iii. associative law

Which one is correct?

4. In which of the following condition a gas behaves like can ideal gas?

5. The Young's modulus of the material of a wire is $2 \times 10^{11} \mathrm{Nm}^{-2}$. Calculate the applied stress to increase the length of the wire by $15 \%$.