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

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)

An ideal gas is taken from (P_i, V_i) to (P_f, V_f) in three different ways. Identify the process in which the work done on the gas the most.

Define the internal energy of the system.

Are internal energy and heat energy the same? Explain.

Define one calorie.

Did joule converted mechanical energy to heat energy? Explain.

Can we measure the temperature of the object by touching it?

Give the sign convention for Q and W.

Define the quasi-static process.

Give the expression for work done by the gas.

What is a PV diagram?

Explain Joule’s Experiment of the mechanical equivalent of heat.