|
If you jerk a piece of paper which is under a boo the book will not move. Why?
|
|
0
|
1922
|
August 18, 2016
|
|
A stone when thrown on a glass window smashes the window pane to pieces. But a bullet fired from a gun passes through it making a hole. Why?
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|
0
|
959
|
August 18, 2016
|
|
Why do we beat dusty blanket with a stick to remove dust particles?
|
|
0
|
1140
|
August 18, 2016
|
|
Why the mud from moving wheels of vehicle fly off tangentially ? Or Why the sparks from a grinding wheel fly off tangentially ? Ans. Because of inertia of direction when mud (or sparks) leave the rotating wheel, they try of follow a tangential linear moti
|
|
0
|
4555
|
August 18, 2016
|
|
Assertion made by Newton's first law of motion that eveifoody continues in its state of uniform motion in the absence of external force appears to be contradicted in everybody experience. Why?
|
|
0
|
656
|
August 18, 2016
|
|
A body moves along a circular path such that its speed remains fixed. Will there be a force acting on the body?
|
|
0
|
497
|
August 18, 2016
|
|
Why pseudo forces are called inertial forces?
|
|
0
|
538
|
August 18, 2016
|
|
Is it correct to say that law of conservation of momentum is valid for elastic collisions only?
|
|
0
|
508
|
August 18, 2016
|
|
Why action and reaction being equal and opposite do not cancel each other?
|
|
0
|
552
|
August 18, 2016
|
|
Give a relation for impulse in scalar form
|
|
0
|
1154
|
August 18, 2016
|
|
What is an impulse?
|
|
0
|
1820
|
August 18, 2016
|
|
It is easy to catch a table tennis ball, then a cricket ball, even when both are moving with the same velocity. Why?
|
|
0
|
3363
|
August 18, 2016
|
|
What do you understand by the statement that the second law of motion is a local relation?
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|
0
|
2309
|
August 18, 2016
|
|
What is gravitational unit of force?
|
|
0
|
2848
|
August 18, 2016
|
|
Why do we pull the rope downwards for climbing up?
|
|
0
|
564
|
August 18, 2016
|
|
Suppose you are seated in a cabin which has no doors, no windows etc. and is also sound proof. Shall it be possible to detect the uniform velocity with which this cabin is moving ? Why?
|
|
0
|
974
|
August 18, 2016
|
|
Mention the conditions for maximum and minimum pull of a lift on a supporting cable
|
|
0
|
754
|
August 18, 2016
|
|
Is the law of conservation of ihomentum valid for a system consisting of more than two particles?
|
|
0
|
434
|
August 18, 2016
|
|
Can a body in linear motion be in equilibrium ? Why?
|
|
0
|
534
|
August 18, 2016
|
|
A passenger sitting in a bus at rest pushes it from within. Will it move ? Why?
|
|
0
|
2715
|
August 18, 2016
|
|
Action and reaction are equal in magnitude and opposite in direction, then why do not they cancel/ balance each other?
|
|
0
|
678
|
August 18, 2016
|
|
In a game of tug of war, two opposing terms are pulling the rope with equal (in magnitude) but opposite force of 1000 kg wt. at each end of the rope. What is the tension in the rope if a condition of equilibrium exists?
|
|
0
|
1798
|
August 18, 2016
|
|
Can a rocket operate in free space?
|
|
0
|
531
|
August 18, 2016
|
|
Why does a heavy gun not kick so strongly as a light gun using the same bullets (i.e., cartridges)?
|
|
0
|
3205
|
August 18, 2016
|
|
An astronaut comes out a spaceship accelerating in space with an acceleration a ms-2. Neglecting the gravitational force of nearby stars, what is the acceleration of the astronaut at the moment he is out of the spaceship?
|
|
0
|
421
|
August 18, 2016
|
|
Is human body a rigid body?
|
|
0
|
2127
|
August 18, 2016
|
|
In which direction the standing passengers of a moving bus fall if the driver suddenly applies brakes to stop the bus?
|
|
0
|
502
|
August 18, 2016
|
|
Is an external force required to keep a body in uniform motion?
|
|
0
|
1733
|
August 18, 2016
|
|
If the net external force acting on a body is zero, then the body at rest continues to remain at rest and a body in motion continues to move with uniform motion. What is the name given to this property of the body?
|
|
0
|
1566
|
August 18, 2016
|
|
Why does a cricketer move his hands backwards when holding a catch?
|
|
0
|
1782
|
August 18, 2016
|