Physics 1st Paper MCQ-Dinajpur Board-2021

1. What is called a pendulum which takes 0.5 second to make maximum displacement from the equilibrium?

2. Mass and radius of a wheel is $2.5 \mathrm{~kg}$ and $2 \mathrm{~m}$ respectively. The torque needed to produce $10 \mathrm{rads}^{-2}$ of angular acceleration to the wheel is -

3. The magnitude of the resultant of two vectors will be maximum when angle between them is -

4. Angle of banking at every track of radius $25 \mathrm{~m}$ and $36 \mathrm{~m}$ at two places $A$ and $B$ respectively is $2.5^{\circ}$ [Width of the both roads is $5 \mathrm{~m}$ ]

The ratio of maximum velocity of a car at the two tracks is -

5. A mango of $200 \mathrm{gm}$ falls down from a branch of height $15 \mathrm{~m}$ on the mud below and produces a hole of $10 \mathrm{~cm}$ depth. $\left[\mathrm{g}=9.8 \mathrm{~ms}^{-2}\right]$

At what height from the earth the potential energy of the mango will be twice its kinetic energy?