Physics 1st Paper CQ-Jessore Board-2019

Define non-conservative force.

When the spring of a toy car is winded and placed on a surface, the car moves forward - Explain why.

Calculate the frequency with which the spring will oscillate.

Explain the velocity vs time graph of the oscillating spring with mathematical analysis.

What is torque?

If the earth suddenly stops rotating about its own axis then explain the change in ' $g$ ' on earth surface.

Calculate the number of complete rotations performed by the first rod before it stops.

Mathematically compare the angular kinetic energy of the two rotating rod.

Define circular motion.

While a bullet is shot from a gun, which one will have greater kinetic energy - Explain.

Calculate the magnitude of velocity with which the object will drop at point $M$.

Mathematically verify the inequality $\mathrm{OP}>\mathrm{PH}$.

Define bound vector.

Least count of a spherometer is $0.01 \mathrm{~mm}$ - Explain.

Calculate the magnitude of projection of $\vec{Q}$ on $\vec{P}$.

The triangle formed by joining points $P, Q, R$ in order is a right angled triangle- Verify the statement mathematically.

State Boyels' law.

Explain the graph PV vs P of an ideal gas at constant temperature.

Calculate the temperature of gas enclosed in the cylinder.

Mathematically compare the average kinetic energy of the gas enclosed in two container.