Introduction to Physics

Question: What is the density of liquid of mass 2000 kg and volume 2 m3. Given Mass, m = 2000 kg volume, v = 2…

The space occupied by a body is called its volume. If we drop a piece of cork and a piece of iron of the same…

Question: The mass of a woman wearing a shoe is 50kg. The area of the bottom of the shoe is 200 cm2. Find the pressure.…

Can you stand on a single leg easily that you can do by using your two legs? The shoes pierce into the mud when one…

An electric motor is used to lift a body of weight l0 N at a height 5m. It uses electrical energy of 65 J a)…

We fulfill our daily needs with the help of transformation of energy. For example we run an engine by transforming chemical energy stored in petrol…

A person of mass 70 kg can stair up 30 steps of 25 cm height each in 15 s. What is his power? Here, Mass…

We can get the unit of power by dividing the unit of work with that of time. Since the unit of work is joule (J)…

We need different forms of energy for doing different kinds of work. For example we need heat to boil water. We get light energy from…

Nothing can move or work without energy. We need energy for our survival. The amount of work we do everyday depends on our energy level.…