HSC Science Class 11 - Tamil Nadu Board of Secondary Education Question Bank Solutions

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?.

A wind-powered generator converts wind energy into electric energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. For wind speed v, the electrical power output will be proportional to ______

Two equal masses m₁ and m₂ are moving along the same straight line with velocities 5 ms^-1 and -9 ms^-1 respectively. If the collision is elastic, then calculate the velocities after the collision of m₁ and m₂, respectively.

Arrive at an expression for power and velocity. Give some examples for the same.

A ball with a velocity of 5 ms⁻¹ impinges at an angle of 60˚ with the vertical on a smooth horizontal plane. If the coefficient of restitution is 0.5, find the velocity and direction after the impact.

A bullet of mass 20 g strikes a pendulum of mass 5 kg. The centre of mass of the pendulum rises a vertical distance of 10 cm. If the bullet gets embedded into the pendulum, calculate its initial speed.

If the acceleration due to gravity becomes 4 times its original value, then escape speed ____________.

Explain the variation of g with latitude.

Explain the variation of g with altitude.

Explain the variation of g with depth from the Earth’s surface.

Suppose we go 200 km above and below the surface of the Earth, what are the g values at these two points? In which case, is the value of g small?

Calculate the change in g value in your district of Tamil nadu. (Hint: Get the latitude of your district of Tamil nadu from Google). What is the difference in g values at Chennai and Kanyakumari?

State Pascal’s law in fluids.

State Archimedes principle.

What do you mean by upthrust or buoyancy?

State the law of floatation.

Derive an equation for the total pressure at a depth ‘h’ below the liquid surface.

State and prove Pascal’s law in fluids.

State and prove Archimedes principle.

We can cut vegetables easily with a sharp knife as compared to a blunt knife. Why?