Question 1 :
A ball moving on a table top eventually stops. What isthe reason ?
Question 4 :
A block is given a initial push along rough horizontal fixed table surface and after some time it stops due to friction. For the system of block and table<br>
Question 5 :
Friction does not depend on the nature of the surface in contact.<br>
Question 7 :
When two bodies are made extra smooth the force of friction ..............
Question 9 :
To move at same speed, a car with flat face and another with streamlined body, will require different amount of force from the engine. The engine of the streamline bodied car will:
Question 11 :
On $26^{th} January, 2001$, a major earthquake occured in _____ district of Gujarat.
Question 12 :
The Earth's crust plates moves brushing past each other or collide. It causes:
Question 15 :
Fill in the blank:<br/>A weak earthquake has a magnitude _________ on a Richter scale.
Question 17 :
The boundaries of the plates, called weak zones, are also known as:
Question 20 :
How many seismograph stations are used to locate the epicentre of an earthquake?
Question 21 :
Read the statements and mark the correct one(s)i. Braille cells are read from left to right.ii Each Braille character is made up of six dots.iii Braille can only be produced manually.
Question 23 :
When does the tumbling of coloured objects presents varying colours and patterns in kaleidoscope?<br/>
Question 24 :
Far points of myopic eye is $250\ cm$, then the focal length of the lens to be used will be
Question 27 :
What is the maximum capacity of a normal human eye to see small objects?
Question 29 :
When a force acts on a large area, the pressure it exerts is more.
Question 31 :
In terms of physics, which of the following are considered as fluids?<br>
Question 33 :
Compare the pressure exerted by a sharp needle on a surface and the pressure exerted by a blunt needle.
Question 34 :
Assertion: Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel.
Reason: Fluids cannot distribute the external pressure equally to all portions.
Question 35 :
A vehicle sinks into soft ground. The vehicle is changed so that it does not sink as far. Which change is made?
Question 37 :
A nurse applies a force of 3.8 N to the syringe's piston of radius 0.9 cm. Find the increase in pressure of the fluid in the syringe?
Question 38 :
The pressure due to atmosphere is $1.013\times 10^5$Pa. Find the force exerted by the atmosphere on the top surface of a table $2m$ long and $1m$ wide.<br>
Question 39 :
Magnetic force is a non contact force because for magnetic force to apply
Question 40 :
Assertion: Hydrostatic pressure is not a vector quantity.
Reason: Pressure is force divided by area, and force is a vector quantity.
Question 46 :
State True or False :Gravity of Earth, attracts all objects towards the centre of Earth.
Question 47 :
If the force on the surface is doubled and the area is reduced to half, pressure will
Question 49 :
The pressure exerted by solids is a little different from that of fluids as in the case of solids, due to
Question 50 :
Assertion: A body having the uniform density has same point, as centre of gravity and centre of buoyancy
Reason: While formulating the equation for positioning centre of mass and centre of buoyancy,has difference of the term of uniform density only.