Gravitation — Physics STD 11 Science — Question

Physical quantity is found from the area under force-time graph?

An athelete runs some distance before taking a jump. Explain why?

Which physical terms remain conserved in an inelastic collision?

Is it possible that a body have a constant velocity but varying speed?

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: Work done by the resistive force of air on a vibrating pendulum in bringing it to rest.

Which type of substances are called elastomers? Give one example.

State if the following statements is true or false. Give reasons for your answer: Total energy of a system is always conserved, no matter what internal and external forces on the body are present.

A metal disc has a hole on it. What happens to the size of hole when the disc is heated?

If the absolute temperature of a gas is quadrupled, how many times will the root mean square velocity of its molecules increases? How many times will its total energy increase?

Why soap bubble bursts after some time?