Maths-
General
Easy
Question
The value of k for which the lines
and
are perpendicular is
- 3
- -1
- 2
- -2
The correct answer is: 2
Related Questions to study
maths-
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=
maths-General
maths-
If 5 cas 
If 5 cas 
maths-General
physics-
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
maths-
The values of
satisfying
and
are
The values of
satisfying
and
are
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 
tan
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 
tan
or 
tan
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

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

Average speed
physics-
A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the ball during its flight (air resistance is neglected)

In the positive region the velocity decreases linearly (during rise) and in the negative region velocity increases linearly (during fall) and the direction is opposite to each other during rise and fall, hence fall is shown in the negative region
A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the ball during its flight (air resistance is neglected)

physics-General
In the positive region the velocity decreases linearly (during rise) and in the negative region velocity increases linearly (during fall) and the direction is opposite to each other during rise and fall, hence fall is shown in the negative region
physics-
Which of the following graphs cannot possibly represent one dimensional motion of a particle

I is not possible because total distance covered by a particle increases with time
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values
IV is not possible because speed can never be negative
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values
IV is not possible because speed can never be negative
Which of the following graphs cannot possibly represent one dimensional motion of a particle

physics-General
I is not possible because total distance covered by a particle increases with time
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values
IV is not possible because speed can never be negative
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values
IV is not possible because speed can never be negative
physics-
Which of the following graphs cannot possibly represent one dimensional motion of a particle

I is not possible because total distance covered by a particle increases with time
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values
IV is not possible because speed can never be negative
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values
IV is not possible because speed can never be negative
Which of the following graphs cannot possibly represent one dimensional motion of a particle

physics-General
I is not possible because total distance covered by a particle increases with time
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values
IV is not possible because speed can never be negative
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values
IV is not possible because speed can never be negative
maths-
The solution of
is
The solution of
is
maths-General
maths-
If 
If 
maths-General
Physics-
A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the ball during its flight (air resistance is neglected)?

In the positive region the velocity decreases linearly (during rise) and in the negative region velocity increases linearly (during fall) and the direction is opposite to each other during rise and fall, hence fall is shown in the negative region
A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the ball during its flight (air resistance is neglected)?

Physics-General
In the positive region the velocity decreases linearly (during rise) and in the negative region velocity increases linearly (during fall) and the direction is opposite to each other during rise and fall, hence fall is shown in the negative region
physics-
Acceleration velocity graph of a particle moving in a straight line is as shown in figure. The slope of velocity-displacement graph

From acceleration-velocity graph, we have
where
is a constant which represents the slope of the given line.
As,
so 
or
constant
Thus, the slope of velocity-displacement graphs is same as that of acceleration velocity. Which is constant.
As,
or
Thus, the slope of velocity-displacement graphs is same as that of acceleration velocity. Which is constant.
Acceleration velocity graph of a particle moving in a straight line is as shown in figure. The slope of velocity-displacement graph

physics-General
From acceleration-velocity graph, we have
where
is a constant which represents the slope of the given line.
As,
so 
or
constant
Thus, the slope of velocity-displacement graphs is same as that of acceleration velocity. Which is constant.
As,
or
Thus, the slope of velocity-displacement graphs is same as that of acceleration velocity. Which is constant.
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

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

Average speed
maths-
If
then solutions of
are in -
If
then solutions of
are in -
maths-General