Physics

#### The displacement of a particle in x direction is given by x.=9-5t+4t^{2} Find the Velocity at time t=0

PhysicsGeneral

- -8 ms
^{-1} - 3 ms
^{-1} - 10 ms
^{-1} - -5 ms
^{-1}

^{-1}^{-1}^{-1}^{-1}#### Answer:The correct answer is: -5 ms^{-1}

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### Related Questions to study

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#### If defined by

#### If defined by

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physics

#### A freely falling particle covers a building of 45 m height in one second. Find the height of the point from where the particle was released.[g=10 ms^{-2}]

#### A freely falling particle covers a building of 45 m height in one second. Find the height of the point from where the particle was released.[g=10 ms^{-2}]

physicsGeneral

maths-

#### If

#### If

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physics

#### The distance travelled by a particle is given by S=3+2t +5t^{2}The initial velocity of the particle is…..

#### The distance travelled by a particle is given by S=3+2t +5t^{2}The initial velocity of the particle is…..

physicsGeneral

maths-

#### If

#### If

maths-General

physics-

#### For the arrangement shown in figure the time interval after which the water jet ceases to cross the wall (area of cross section of tank is A and orifice is ‘a’)

Velocity of efflux =

Find ‘h’ to have range of ejected water

time taken by liquid to drain out from H to h is

Find ‘h’ to have range of ejected water

time taken by liquid to drain out from H to h is

#### For the arrangement shown in figure the time interval after which the water jet ceases to cross the wall (area of cross section of tank is A and orifice is ‘a’)

physics-General

Velocity of efflux =

Find ‘h’ to have range of ejected water

time taken by liquid to drain out from H to h is

Find ‘h’ to have range of ejected water

time taken by liquid to drain out from H to h is

physics-

#### Figure shows a stream of fluid emerging from a tube in the base of an open fixed tank. The expression of ‘y’ (Maximum height traveled by jet of water) is

#### Figure shows a stream of fluid emerging from a tube in the base of an open fixed tank. The expression of ‘y’ (Maximum height traveled by jet of water) is

physics-General

physics-

#### A thin movable plate is separated from two fixed plates and by two highly viscous liquids of coefficients of viscosity and as shown, where Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is ‘h’, then the distance ‘’ of movable plate from upper plate such that movable plate can be moved with a finite velocity by applying the minimum possible force on movable plate is ( assume only linear velocity distribution in each liquid).

Viscous force due to upper liquid

Viscous force due to lower liquid =

If total force is minimum

Viscous force due to lower liquid =

If total force is minimum

#### A thin movable plate is separated from two fixed plates and by two highly viscous liquids of coefficients of viscosity and as shown, where Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is ‘h’, then the distance ‘’ of movable plate from upper plate such that movable plate can be moved with a finite velocity by applying the minimum possible force on movable plate is ( assume only linear velocity distribution in each liquid).

physics-General

Viscous force due to upper liquid

Viscous force due to lower liquid =

If total force is minimum

Viscous force due to lower liquid =

If total force is minimum

physics-

#### A vertical jet of water coming out of a nozzle with velocity 20 m/s supports a plate of mass M stationary at a height h = 15m, as shown in the figure. If the rate of water flow is 1 litre per second, the mass of the plate is (Assume the collision to be inelastic).

Force by liquid = Mg

But and

But and

#### A vertical jet of water coming out of a nozzle with velocity 20 m/s supports a plate of mass M stationary at a height h = 15m, as shown in the figure. If the rate of water flow is 1 litre per second, the mass of the plate is (Assume the collision to be inelastic).

physics-General

Force by liquid = Mg

But and

But and

physics-

#### A conical flask of mass 10 kg and base area as 10^{3} cm^{2} is floating in liquid of relative density 1.2, as shown in the figure. The force that liquid exerts on curved surface of conical flask will be (Given g = 10 m/s^{2})

= Buoyant force = weight

F = 20 N in down ward direction

#### A conical flask of mass 10 kg and base area as 10^{3} cm^{2} is floating in liquid of relative density 1.2, as shown in the figure. The force that liquid exerts on curved surface of conical flask will be (Given g = 10 m/s^{2})

physics-General

= Buoyant force = weight

F = 20 N in down ward direction

physics-

#### A sphere of radius ‘R’ floats in a liquid of density ‘s’ such that its diameter x-x is below distance ‘h’ from free surface as shown. The density of sphere is r. The sphere is depressed slightly and released. The frequency of small oscillation is

and

#### A sphere of radius ‘R’ floats in a liquid of density ‘s’ such that its diameter x-x is below distance ‘h’ from free surface as shown. The density of sphere is r. The sphere is depressed slightly and released. The frequency of small oscillation is

physics-General

and

maths-

#### The function

#### The function

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#### A particle is thrown in upward direction with Velocity V_{0} It passes through a point p of height h at time t_{1} and t2 so t_{1}+t_{1}

#### A particle is thrown in upward direction with Velocity V_{0} It passes through a point p of height h at time t_{1} and t2 so t_{1}+t_{1}

physicsGeneral

physics-

#### Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the figure. The regions which contain some points of zero magnetic induction are

) II and IV

Hence, magnetic induction in region I and IV will be zero.

Hence, magnetic induction in region I and IV will be zero.

#### Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the figure. The regions which contain some points of zero magnetic induction are

physics-General

) II and IV

Hence, magnetic induction in region I and IV will be zero.

Hence, magnetic induction in region I and IV will be zero.

maths-

#### defined by .

#### defined by .

maths-General