HSC Science कक्षा ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Physics

Explain various types of friction.

Suggest a few methods to reduce friction.

State the empirical laws of static and kinetic friction.

A long stick rests on the surface. A person standing 10 m away from the stick. With what minimum speed an object of mass 0.5 kg should he has thrown so that it hits the stick. (Assume the coefficient of kinetic friction is 0.7).

People often say “For every action, there is an equivalent opposite reaction”. Here they meant ‘action of a human’. Is it correct to apply Newton’s third law to human actions? What is mean by ‘action’ in Newton's third law? Give your arguments based on Newton’s laws.

Two masses m₁ and m₂ are connected with a string passing over a frictionless pulley fixed at the comer of the table as shown in the figure. The coefficient of static friction of mass m₁ with the table is µ_s Calculate the minimum mass m₃ that may be placed on m₁ to prevent it from sliding. Check if m₁ = 15 kg, m₂ = 10 kg, m₃ = 25 and µ_s = 0.2.

Briefly explain ‘rolling friction.'

Briefly explain the origin of friction. Show that in an inclined plane, the angle of friction is equal to the angle of repose.

A disc of the moment of inertia I_a is rotating in a horizontal plane about its symmetry axis with a constant angular speed ω. Another disc initially at rest of moment of inertia I_b is dropped coaxially onto the rotating disc. Then, both the discs rotate with the same constant angular speed. The loss of kinetic energy due to friction in this process is, ______

The speed of a solid sphere after rolling down from rest without sliding on an inclined plane of vertical height h is, ______

What is the condition for pure rolling?

What is the difference between sliding and slipping?

Discuss rolling on an inclined plane and arrive at the expression for acceleration.

A uniform disc of mass 100g has a diameter of 10 cm. Calculate the total energy of the disc when rolling along with a horizontal table with a velocity of 20 cms^-1. (take the surface of the table as reference)

State Bernoulli’s theorem.

What are the energies possessed by a liquid? Write down their equations.

What happens to the pressure inside a soap bubble when air is blown into it?

State the principle and usage of the Venturimeter.

Obtain an equation of continuity for a flow of fluid on the basis of conservation of mass.

State and prove Bernoulli’s theorem for a flow of incompressible, non-viscous, and streamlined flow of fluid.