Maths-
The value of k for which the lines 
and 
are perpendicular is
Maths-General
- 3
- -1
- 2
- -2
Answer:The correct answer is: 2
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If the straight lines x=1+s,y=-3-λs,z=1+λs and 
, z=2-t, with parameters s and t respectively, are co planar, then λ=
If the straight lines x=1+s,y=-3-λs,z=1+λs and , z=2-t, with parameters s and t respectively, are co planar, then λ=
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If 5 cas 
If 5 cas
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A boy begins to walk eastward along a street infront of his house and the graph of his displacement from home is shown in the following figure. His average speed for in the whole-time interval is equal to
A boy begins to walk eastward along a street infront of his house and the graph of his displacement from home is shown in the following figure. His average speed for in the whole-time interval is equal to
physics-General
physics-
The displacement-time graph of a moving object is shown in figure. Which of the velocity-time graphs shown in figure could represent the motion of the same body?
Think of the lope of the given displacement-time graph at different points and you would arrive at the correct answer.
Alternatively, look at the self-illustrative figure.
Alternatively, look at the self-illustrative figure.
The displacement-time graph of a moving object is shown in figure. Which of the velocity-time graphs shown in figure could represent the motion of the same body?
physics-General
Think of the lope of the given displacement-time graph at different points and you would arrive at the correct answer.
Alternatively, look at the self-illustrative figure.
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maths-
The number of solutions of the equation 
where 
for 
in the interval 
is
The number of solutions of the equation where for in the interval is
maths-General
maths-
The values of 
satisfying 
and 
are
The values of satisfying and are
maths-General
maths-
The distance between the line 
and the plane 
is (units)
The distance between the line and the plane is (units)
maths-General
maths-
The value of k such that 
lies in the plane 2x-4y+z+7=0 is
The value of k such that lies in the plane 2x-4y+z+7=0 is
maths-General
physics-
A body of mass 
is resting on a wedge of angle as shown in figure. The wedge is given at acceleration 
. What is the value of a son that the mass just falls freely?
The horizontal acceleration 
of the wedge should be such that in time the wedge moves the horizontal distance 
. The body must fall through a vertical distance 
under gravity. Hence,
and 
tan
or 
of the wedge should be such that in time the wedge moves the horizontal distance . The body must fall through a vertical distance under gravity. Hence, and tan
or A body of mass is resting on a wedge of angle as shown in figure. The wedge is given at acceleration . What is the value of a son that the mass just falls freely?
physics-General
The horizontal acceleration of the wedge should be such that in time the wedge moves the horizontal distance . The body must fall through a vertical distance under gravity. Hence,
and
tanor
of the wedge should be such that in time the wedge moves the horizontal distance . The body must fall through a vertical distance under gravity. Hence, and tan
or physics-
Velocity-time 
graph for a moving object is shown in the figure. Total displacement of the object during the time interval when there is non-zero acceleration and retardation is
Between time interval 20s the 4s, there is non-zero acceleration and retardation. Hence, distance travelled during this interval = Area between time interval 20 s to 40 s
Velocity-time graph for a moving object is shown in the figure. Total displacement of the object during the time interval when there is non-zero acceleration and retardation is
physics-General
Between time interval 20s the 4s, there is non-zero acceleration and retardation. Hence, distance travelled during this interval = Area between time interval 20 s to 40 s
physics-
In the following graph, distance travelled by the body in metres is
Distance = Area covered between velocity and time axis
In the following graph, distance travelled by the body in metres is
physics-General
Distance = Area covered between velocity and time axis
physics-
A cyclist starts from the centre 
of a circular park of radius one kilometre, reaches the edge 
of the park, then cycles along the circumference and returns to the centre along 
as shown in figure. If the round trip takes ten minutes, the net displacement and average speed of the cyclist (in metre and kilometre per hour) is
Net displacement 
and total distance 
Average speed
and total distance Average speed
A cyclist starts from the centre of a circular park of radius one kilometre, reaches the edge of the park, then cycles along the circumference and returns to the centre along as shown in figure. If the round trip takes ten minutes, the net displacement and average speed of the cyclist (in metre and kilometre per hour) is
physics-General
Net displacement and total distance
Average speed
and total distance Average speed
maths-
General solution of 
is
General solution of is
maths-General
physics-
A body is at rest at 
. At 
, it starts moving in the positive 
-direction with a constant acceleration. At the same instant another body passes through moving in the positive -direction with a constant speed. The position of the first body is given by 
after time ‘
’ and that of the second body by 
after the same time interval. Which of the following graphs correctly describes 
as a function of time ‘’
and 
.This equation is of parabola
and 
As
graph shows possess minima at 
A body is at rest at . At , it starts moving in the positive -direction with a constant acceleration. At the same instant another body passes through moving in the positive -direction with a constant speed. The position of the first body is given by after time ‘’ and that of the second body by after the same time interval. Which of the following graphs correctly describes as a function of time ‘’
physics-General
and .This equation is of parabola and As
graph shows possess minima at physics-
A particle starts from rest at and undergoes an acceleration in 
with time in second which is as shownWhich one of the following plot represents velocity 
in 
time in second?
A particle starts from rest at
The equation of motion
The velocity for next 2 s
Hence,
graph will be as shown.
The equation of motion
The velocity for next 2 s
Hence,
graph will be as shown.A particle starts from rest at and undergoes an acceleration in with time in second which is as shownWhich one of the following plot represents velocity in time in second?
physics-General
A particle starts from rest at
The equation of motion
The velocity for next 2 s
Hence, graph will be as shown.
The equation of motion
The velocity for next 2 s
Hence,
graph will be as shown.