physics of class 9

The half life of radon is 3.8 days. Calculate how much radon will be left out of 10.24 milligram after 19 day..

- This is a representative list of topics covered in our Grade 9 Physics program - however all programs will be customized for the individual studen..

01. A body of mass 2kg is raised to a height of 25m. Calculate the potential energy possessed by the body. Solution: Mass of the body (m) = 2kg Height (h) = 25 m Potential energy of the body = mgh 02. A bag of rice weighs 75kg. To what height is it raised if the work done in lifting it is 4900 J. S..

Let m be the mass of a body on Earth. Its weight on Earth is given by the equation The weight of the same body on moon (W m ) is given by, Dividing eq(2) by eq(1) we get, But we know that M e =100 M m and R e = 4 R m..

Consider a particle moving along a straight line with uniform acceleration 'a'. At t=0, let the particle be at A and u be its initial velocity and when t = t, v be its final velocity. v = u + at I equation of motio..

Freely falling object: Is the object which moves towards the Earth due to force of gravity. Acceleration due to gravity: It is the acceleration produced in an object due to force of gravity. Equations of motion for a freely falling object are: Equations of motion for an object mov..

The motion of a body under gravity is a uniformly accelerated motion and hence all the equations of motion for uniformly accelerated motion in a straight line is applicable to the motion of bodies under gravity. In the case of a body moving under gravity, acceleration is acceleration due to gravity..

Take half kg of water in a vessel. Note its temperature Heat it for exactly 2 minutes using a Bunsen burner. Again note down its temperatur..

01. A man of mass 60 kg runs up a flight of 60 steps in 40 seconds. If each step is 20 cm high, calculate his power. Solution: Since the man runs up a flight of steps, the work done will be equal to the potential energy. Height = height of one step x number of ste..

1. A body weighs 12 kg on a weighing machine on the Earth. If it is taken to the moon, will the weighing machine show any change in reading? If so what is the weight of the body on moon. Solution: There will be a change in the reading shown by the weighing machine. Weight of the object on moon (W ..