Physics-
Which of the following graphs cannot possibly represent one dimensional motion of a particle
Physics-General
- I and II
- II and III
- II and IV
- All four
Answer:The correct answer is: All fourI 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
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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-
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-
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
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 maths-
The values of satisfying 
and 
are
The values of satisfying and are
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-
If 5 cas 
If 5 cas
maths-General
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-
The value of k for which the lines 
and 
are perpendicular is
The value of k for which the lines and are perpendicular is
maths-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.
Alternatively, look at the self-illustrative figure.
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 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-
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