Systems of Particles and Rotational Motion — Physics STD 11 Science — Question

Relation between escape velocity v_e and orbital velocity v₀ is __________.

A 50kg man is running at a speed of 18kmh^-1. If all the kinetic energy of the man can be used to increase the temperature of water from 20°C to 30°C, how much water can be heated with this energy?

Two persons pull a rope towards themselves. Each person exerts a force of 100N on the rope. Find the Young's modulus of the material of the rope if it extends in length by 1cm. Original length of the rope = 2m and the area of cross-section = 2cm².

A particle is in linear simple harmonic motion between two points, A and B, 10cm apart. Take the direction from A to B as the positive direction and give the signs of velocity, acceleration and force on the particle when it is:
At the end B.

Do the electrodes in an electrolytic cell have fixed polarity like a battery?

_______ waves do not transfer any energy and momentum in the material medium.

Gravitational force of attraction between two bodies of unit mass placed at unit distance apart is known as _________.

A body of mass 2kg initially at rest moves under the action of an applied horizontal force of 7N on a table with coefficient of kinetic friction = 0.1. Compute the:
Work done by the net force on the body in 10s.

The force of attraction between earth and any object lying on or near its surface is known as ­­__________.