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

If a particle executes uniform circular motion in the xy plane in a clockwise direction, then the angular velocity is in ______

If an object is thrown vertically up with the initial speed u from the ground, then the time taken by the object to return back to the ground is ______

Define speed.

A water fountain on the ground sprinkles water all around it. If the speed of the water coming out of the fountain is v. Calculate the total area around the fountain that gets wet.

The work done by the conservative force for a closed path is ______

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then, the long piece will have a force constant of ______

Explain how the definition of work in physics is different from general perception.

Explain with graphs the difference between work done by a constant force and by a variable force.

State and explain the work-energy principle. Mention any three examples for it.

Calculate the work done by a force of 30 N in lifting a load of 2kg to a height of 10 m (g = 10 m s⁻²)

The linear momentum and position vector of the planet is perpendicular to each other at _________.

According to Kepler’s second law, the radial vector to a planet from the Sun sweeps out equal areas in equal intervals of time. This law is a consequence of ___________.

State Kepler’s three laws.

State Newton’s Universal law of gravitation.

Discuss the important features of the law of gravitation.

Explain how Newton verified his law of gravitation.

Assume that you are in another solar system and provided with the set of data given below consisting of the planets’ semi-major axes and time periods. Can you infer the relation connecting semi-major axis and time period?

If the masses and mutual distance between the two objects are doubled, what is the change in the gravitational force between them?

If the angular momentum of a planet is given by `vec"L" = 5"t"^2hat"i" - 6"t"hat"j" + 3hat"k"`. What is the torque experienced by the planet? Will the torque be in the same direction as that of the angular momentum?

Suppose unknowingly you wrote the universal gravitational constant value as G = 6.67 × 10¹¹. instead of the correct value, G = 6.67 × 10⁻¹¹, what is the acceleration due to gravity g' for this incorrect G? According to this new acceleration due to gravity, what will be your weight W'?