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

Physics-General

#### Answer:The correct answer is:

Takingthe motion from to

Taking the motion from to

## Book A Free Demo

+91

Grade

Select Grade

### Related Questions to study

maths-

#### If then = ---

#### If then = ---

maths-General

physics-

#### The figure shows a double slit experiment *P* and *Q* are the slits. The path lengths *PX* and *QX* are and respectively, where *n *is a whole number and is the wavelength. Taking the central fringe as zero, what is formed at *X*

For brightness, path difference

So second is bright.

So second is bright.

#### The figure shows a double slit experiment *P* and *Q* are the slits. The path lengths *PX* and *QX* are and respectively, where *n *is a whole number and is the wavelength. Taking the central fringe as zero, what is formed at *X*

physics-General

For brightness, path difference

So second is bright.

So second is bright.

maths-

#### The parabolas divide the square region bounded by the lines x=4, y=4 and the co-ordinate axes. If are respectively the areas of these parts numbered from top to bottom then is

#### The parabolas divide the square region bounded by the lines x=4, y=4 and the co-ordinate axes. If are respectively the areas of these parts numbered from top to bottom then is

maths-General

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 acceleration-time 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

physics-General

Area under acceleration-time graph gives the change in velocity. Hence,

Therefore, the correct option is [b].

Therefore, the correct option is [b].

physics-

#### 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

physics-General

Since (negligible)

maths-

#### If then the general value of 'α ' is

#### If then the general value of 'α ' is

maths-General

maths-

#### The area bounded by , Y-axis and the line y=e is

#### The area bounded by , Y-axis and the line y=e is

maths-General

maths-

#### 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

maths-General

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

Let the particle touches the sphere t the point

Let

In

or

Let

In

or

#### 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

physics-General

Let the particle touches the sphere t the point

Let

In

or

Let

In

or

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

physics-General

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 speed-time 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 speed-time graphs for motor bike and car are represented by and respectively Then

physics-General

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-

#### The velocity-time graph of a body moving in a straight line is shown in the figure. The displacement and distance travelled by the body in are respectively

Displacement = Summation of all the area with sign

Distance = Summation of all the areas without sign

Distance = Summation of all the areas without sign

#### The velocity-time graph of a body moving in a straight line is shown in the figure. The displacement and distance travelled by the body in are respectively

physics-General

Displacement = Summation of all the area with sign

Distance = Summation of all the areas without sign

Distance = Summation of all the areas without sign

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.

physics-General

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 distance-time 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 distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point

physics-General

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 ‘’

physics-

#### A particle shows distance-time 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 distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point

physics-General