Physics

#### A balloon has a mass of 10 g in air. The air escapes from the balloon at a uniform rate with a velocity of 5 cm/s and the balloon shrinks completely in 2.5sec. calculate the average force acting on the balloon.

PhysicsGeneral

- 10 dyne
- 0 dyne
- 20 dyne
- 5 dyne

#### Answer:The correct answer is: 20 dyne

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### Related Questions to study

physics

#### The motion of a particle of a mass m is describe by y=. Find the once acting on the particle

#### The motion of a particle of a mass m is describe by y=. Find the once acting on the particle

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#### Two bodies A and B each of mass m are fixed together by a massless spring A force F acts on the mass B as shown in figure. At the instant shown, a body A has an aceclration a. what is the acceleration of B

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#### With what acceleration (a) should a bot descend so that a block of mass M placed in it exerts a force on the floor of the box?

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#### A block of mass m=4 kg is placed over a rough inclined plane as shown in figure, The coefficient of friction between the block and plane is r=0.6.A force F=10 N is applied on the block of an angle at 30.The contact force between the block and the plane is

#### A block of mass m=4 kg is placed over a rough inclined plane as shown in figure, The coefficient of friction between the block and plane is r=0.6.A force F=10 N is applied on the block of an angle at 30.The contact force between the block and the plane is

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#### A mass of 6 kg is suspended by a rope of length 2 m form the ceiling . A force of 50 N in the horizental direction is applied at the mid Point P of the rope as shown in figure. what is the angle the rope makes. with the vertical in equilibrium ? (g=10 ms^{2}) Neglect mass of the rope:

#### A mass of 6 kg is suspended by a rope of length 2 m form the ceiling . A force of 50 N in the horizental direction is applied at the mid Point P of the rope as shown in figure. what is the angle the rope makes. with the vertical in equilibrium ? (g=10 ms^{2}) Neglect mass of the rope:

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#### The minimum force required to start pushing a body up a rough (coefficient of ) inclined plane is F_{1}. While the minimum force needed to prevent it from sliding down is F^{2}. If the inclined plane makes an angle from the horizontal. such that than the ratio is

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#### When forces F_{1},F_{2},F_{3} are acting on a particle of mass m such that F^{2} and F^{3} are mulually perpendicelar. then the particle remains stationary. If the force F_{1} is now removed than the acceleration of the particle is

#### When forces F_{1},F_{2},F_{3} are acting on a particle of mass m such that F^{2} and F^{3} are mulually perpendicelar. then the particle remains stationary. If the force F_{1} is now removed than the acceleration of the particle is

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#### Assertion : Frictional forces are conservative forces.

Reason: Polential energy can be associated with frictional forces

#### Assertion : Frictional forces are conservative forces.

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#### Assertion : body of trans 1 k 6 is moving with an acceleration of The rate of change of its momentum is 1 N

Reason : The rate of change of momentum of body = force applied on the body.

#### Assertion : body of trans 1 k 6 is moving with an acceleration of The rate of change of its momentum is 1 N

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#### Assertion : A body falling freely under gravity becomes weightless.

Reason:

#### Assertion : A body falling freely under gravity becomes weightless.

Reason:

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#### Assertion : It is difficult to move bike with its breaks on.

Reason : Rolling friction is converted into sliding friction, which is comparatively larger.

#### Assertion : It is difficult to move bike with its breaks on.

Reason : Rolling friction is converted into sliding friction, which is comparatively larger.

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#### A cricket ball of mass 150 g. is moving with a velocity of 12m/s and is hit by a bat so that the ball is turned back with a velocity of 20 m/s If duration of contact between the ball and the bat is 0.01sec The impulse of the force is

#### A cricket ball of mass 150 g. is moving with a velocity of 12m/s and is hit by a bat so that the ball is turned back with a velocity of 20 m/s If duration of contact between the ball and the bat is 0.01sec The impulse of the force is

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#### Let

#### Let

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#### Average force exerted by the bat is

#### Average force exerted by the bat is

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#### The upper half of an inclined plane of inclination is perfectly smooth while the lower half is rough A body starting from the rest at top come back to rest at the bottom, then the coefficient of friction for the lower half is given by……

#### The upper half of an inclined plane of inclination is perfectly smooth while the lower half is rough A body starting from the rest at top come back to rest at the bottom, then the coefficient of friction for the lower half is given by……

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