Physics-
General
Easy
Question
A child travelling in a train throws a ball outside with a speed 
. According to a child who is standing on the ground, the speed of the ball is
- Same as
- Greater than
- Less than
- None of these
The correct answer is: None of these
Related Questions to study
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If the points with position vectors 
and 
are collinear, then is equal to
If the points with position vectors and are collinear, then is equal to
Maths-General
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× 
+ 
× 
+ 
× 
is equal to
× + × + × is equal to
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If 
= 6 
= 8, 
= 10, then 
is equal to
If = 6 = 8, = 10, then is equal to
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Projection of the vector 
= 
+ 
– 
on the vector 
= + 
+ 
is
Projection of the vector = + – on the vector = + + is
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If = (1, 1) and = (–2, m) are collinear vectors, then m =
If = (1, 1) and = (–2, m) are collinear vectors, then m =
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ABCD is a quadrilateral such that 
, 
& 
. The area of quadrilateral ABCD is –
ABCD is a quadrilateral such that , & . The area of quadrilateral ABCD is –
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The distance of the point B with position vector 
from the line passing through the point A with position vector 
& parallel to vector 
is –
The distance of the point B with position vector from the line passing through the point A with position vector & parallel to vector is –
Maths-General
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The projection of the vector 
on the vector 
is
The projection of the vector on the vector is
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If (2
+ P
+ 2
) is perpendicular to 
then value of P is
If (2 + P + 2) is perpendicular to then value of P is
Maths-General
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If the difference of two unit vectors is again a unit vector then the angle between them is -
If the difference of two unit vectors is again a unit vector then the angle between them is -
Maths-General
Physics-
A particle of mass 
is projected with a velocity 
making an angle of 
with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height 
is
A particle of mass is projected with a velocity making an angle of with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height is
Physics-General
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A car rounds an unbanked curve of radius 92 m without skidding at a speed of 
. The smallest possible coefficient of static friction between the tyres and the road is
A car rounds an unbanked curve of radius 92 m without skidding at a speed of . The smallest possible coefficient of static friction between the tyres and the road is
Physics-General
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A body of mass 
is rotating in a vertical circle at the end of a string of length 
metre. The difference in the kinetic energy at the top and bottom of the circle is
A body of mass is rotating in a vertical circle at the end of a string of length metre. The difference in the kinetic energy at the top and bottom of the circle is
Physics-General
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A cyclist is travelling on a circular section of highway of radius 2500 ft at the speed of 60 mile 
. The cyclist suddenly applies the brakes causing the bicycle to slown sown at constant rate. Knowing that after 8 s the speed has been reduced to 
. The acceleration of the bicycle immediately after the brakes have been applied is
A cyclist is travelling on a circular section of highway of radius 2500 ft at the speed of 60 mile . The cyclist suddenly applies the brakes causing the bicycle to slown sown at constant rate. Knowing that after 8 s the speed has been reduced to . The acceleration of the bicycle immediately after the brakes have been applied is
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A coastguard ship locates a pirate ship at a distance 
. It fires a cannon ball with an initial speed 
. At what angle from horizontal the ball must be fired so that it hits the pirate shi
A coastguard ship locates a pirate ship at a distance . It fires a cannon ball with an initial speed . At what angle from horizontal the ball must be fired so that it hits the pirate shi
Physics-General
