Physics
A particle of mass is initially situated at the point inside a hemispherical surface of radius as shown in figure. A horizontal acceleration of magnitudeis suddenly produced on the particle in the horizontal direction. If gravitational acceleration is neglected, the time taken by particle to touch the sphere again is
PhysicsGeneral



 None of these
Answer:The correct answer is: Let the particle touches the sphere t the point
Let
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If α and β are two different solutions lying between and of the equation then Tan α + Tan β is
If α and β are two different solutions lying between and of the equation then Tan α + Tan β is
mathsGeneral
physics
A cyclist starts from the centre of a circular park of radius 1 km, reaches the edge of the park, then cycles along the circumference and returns to the point as shown in figure. If the round trip takes 10 min, the net displacement and average speed of the cyclist (in metre and kilometer per hour) are
Since, the initial position of cyclist coincides with final position, so his net displacement is zero.
A cyclist starts from the centre of a circular park of radius 1 km, reaches the edge of the park, then cycles along the circumference and returns to the point as shown in figure. If the round trip takes 10 min, the net displacement and average speed of the cyclist (in metre and kilometer per hour) are
physicsGeneral
Since, the initial position of cyclist coincides with final position, so his net displacement is zero.
physics
A the instant a motor bike starts from rest in a given direction, a car overtakes the motor bike, both moving in the same direction. The speedtime graphs for motor bike and car are represented by and respectively Then
Distance travelled by motor bike at s
(18)(60)=540 m
Distance travelled by car at s
=(18)(60)=720 m
Therefore, separation between them at s is 180m. Let, separation between them decreases to zero at time beyond 18s.
Hence, and
s beyond 18s or
Hence, s=27s from start and distant travelled by both is =m
(18)(60)=540 m
Distance travelled by car at s
=(18)(60)=720 m
Therefore, separation between them at s is 180m. Let, separation between them decreases to zero at time beyond 18s.
Hence, and
s beyond 18s or
Hence, s=27s from start and distant travelled by both is =m
A the instant a motor bike starts from rest in a given direction, a car overtakes the motor bike, both moving in the same direction. The speedtime graphs for motor bike and car are represented by and respectively Then
physicsGeneral
Distance travelled by motor bike at s
(18)(60)=540 m
Distance travelled by car at s
=(18)(60)=720 m
Therefore, separation between them at s is 180m. Let, separation between them decreases to zero at time beyond 18s.
Hence, and
s beyond 18s or
Hence, s=27s from start and distant travelled by both is =m
(18)(60)=540 m
Distance travelled by car at s
=(18)(60)=720 m
Therefore, separation between them at s is 180m. Let, separation between them decreases to zero at time beyond 18s.
Hence, and
s beyond 18s or
Hence, s=27s from start and distant travelled by both is =m
physics
Assertion : Owls can move freely during night.
Reason : They have large number of rods on their retina.
Owls can move freely during night, because they have large number of cones on their retina which help them to see in night.
Assertion : Owls can move freely during night.
Reason : They have large number of rods on their retina.
physicsGeneral
Owls can move freely during night, because they have large number of cones on their retina which help them to see in night.
physics
A particle shows distancetime curve as given in this figure. The maximum instantaneous velocity of the particle is around the point
Instantaneous velocity is given by the slope of the curve at that instant from the figure it is clear that slope of the curve is maximum at point ‘’
A particle shows distancetime curve as given in this figure. The maximum instantaneous velocity of the particle is around the point
physicsGeneral
Instantaneous velocity is given by the slope of the curve at that instant from the figure it is clear that slope of the curve is maximum at point ‘’
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In figure, one car at rest and velocity of the light from head light is , tehn velocity of light from head light for the moving car at velocity , would be
Since (negligible)
In figure, one car at rest and velocity of the light from head light is , tehn velocity of light from head light for the moving car at velocity , would be
physicsGeneral
Since (negligible)
physics
A particle starts from rest. Its acceleration time is as shown in the figure. The maximum speed of the particle will be
Area under accelerationtime graph gives the change in velocity. Hence,
Therefore, the correct option is [b].
Therefore, the correct option is [b].
A particle starts from rest. Its acceleration time is as shown in the figure. The maximum speed of the particle will be
physicsGeneral
Area under accelerationtime graph gives the change in velocity. Hence,
Therefore, the correct option is [b].
Therefore, the correct option is [b].
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The area bounded by y=3x and is
The area bounded by y=3x and is
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The area bounded by X axis, x=1 and x=2 is
The area bounded by X axis, x=1 and x=2 is
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If then =
If then =
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physics
The graph shown in the figure represents
Up to time slope of the graph is constant and after slope is zero the body travel with constant speed up to time and then stops
The graph shown in the figure represents
physicsGeneral
Up to time slope of the graph is constant and after slope is zero the body travel with constant speed up to time and then stops
physics
For the velocitytime graph shown in figure below the distance covered by the body in last two seconds of its motion is what fraction of the total distance covered by it in all the seven seconds
For the velocitytime graph shown in figure below the distance covered by the body in last two seconds of its motion is what fraction of the total distance covered by it in all the seven seconds
physicsGeneral
physics
A particle starts from rest at and undergoes an acceleration a in with time in seconds which is as shown Which one of the following plot represents velocity in versus time in seconds
Takingthe motion from to
Taking the motion from to
A particle starts from rest at and undergoes an acceleration a in with time in seconds which is as shown Which one of the following plot represents velocity in versus time in seconds
physicsGeneral
Takingthe motion from to
Taking the motion from to
maths
If then = 
If then = 
mathsGeneral
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?
physicsGeneral
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.