Skip to main content

 Class 10                                                                     Marks: 20

Physics Revision


ATTEMPT ALL QUESTIONS.

Define moment of force. Write relationship between the SI and CGS unit of moment of couple. 2

Find the mass of the scale in equilibrium .  


                                      


Draw diagrams and locate the centre of gravity  of hollow cone and triangular sheet. 2

 State the  type of work done by a coolie  when i)  he lifts a load up ii) when he moves on a horizontal platform carrying load on his head.     2

A force is applied on a body of mass 20kg movong with a velocity of 40 m/s. The body attains a velocity of 50 m/s in 2  s. Calculate the work done by the force. 2

Give one example of  each  i) when chemical energy is converted into electrical energy .

                                                  Ii when electrical energy changes into sound  energy.   2

A ball of mass  200g is thrown vertically upwards with initial velocity of 20 m/s. Calculate its maximum potential energy.       2

State law of conservation of energy and prove it for a feely falling body taking any two points in the fall. 3

Give two conditions for which a force does no work. 2


Comments

Post a Comment

Popular posts from this blog

UNIFORM CIRCULAR MOTION

In uniform circular motion,  1. Speed is constant. 2. Velocity is variable and acts along tangential direction  at a point. 3. Centripetal Force and acceleration act along the radius towards the centre if the circular path.  4. Centrifugal force appears to  act radially outwards. It is a virtual  ,fictitious force, not a real force.
Post a Comment
Read more

ECHO IN LIVING ROOM

Why is echo not heard in our living rooms? To hear echo, the minimum distance between the source and the reflector must be 17m. When this distance is more than 17m, the reflected sound can be distinguished from the original. As the length of our rooms is less than 17m, we don't hear echo.
Post a Comment
Read more