What is the meaning of thermoware?

A man weighing 60 kg runs along the rails with a velocity of 18 km/h and jumps into a car of mass 1 quintal standing on the rails. Calculate the velocity with which the car will start travelling along the rails. (1 quintal=100kg).

A body of mass 5 kg is thrown vertically upwards with a speed of 10 metre per second, what is its kinetic energy when it is thrown? Find its potential energy when it reaches at the highest point also find the maximum height attained by the body.

State the source of the centripetal force that a planet requires to revolve around the sun. On what factors does that force depend? Suppose this force suddenly becomes zero then in which direction will the planet begin to move if no other celestial body affects it?

Suppose you are going on a jet plane and one of the windows breaks due to an accident. What problems do you think you will face?