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Physics

General

Easy

Question

A Particle of mass m is at rest at t=0 The force exerting on it in x-direction is F(t)=F_ae^-k. Which one of the following graph is of speed

The correct answer is:

Related Questions to study

As shown in figure a block of mass m is attached with a cart. If the coefficient of static friction between the surface of cart and block is µ than what would be accelcration a of cart to prevent the falling of block ?

As shown in figure a block of mass m is attached with a cart. If the coefficient of static friction between the surface of cart and block is µ than what would be accelcration a of cart to prevent the falling of block ?

A block B. placed on a horizontal surface is pulled with initial velocity V. If the coefficient of kinetic friction between surface and block is µ . than after bons much time, block will come to rest ?

A block B. placed on a horizontal surface is pulled with initial velocity V. If the coefficient of kinetic friction between surface and block is µ . than after bons much time, block will come to rest ?

An impulsive force of 100 N acts on a body for 1 sec What is the change in its linear momentum ?

An impulsive force of 100 N acts on a body for 1 sec What is the change in its linear momentum ?

parallel

If $f colon R not stretchy rightwards arrow R$ defined by $f left parenthesis x right parenthesis equals fraction numerator e to the power of x squared end exponent minus e to the power of negative x squared end exponent over denominator e to the power of x squared end exponent plus e to the power of negative x squared end exponent end fraction text , then end text f text is end text$

If $f colon R not stretchy rightwards arrow R$ defined by $f left parenthesis x right parenthesis equals fraction numerator e to the power of x squared end exponent minus e to the power of negative x squared end exponent over denominator e to the power of x squared end exponent plus e to the power of negative x squared end exponent end fraction text , then end text f text is end text$

$f colon R not stretchy rightwards arrow R$ is a function defined by $f left parenthesis x right parenthesis equals fraction numerator e to the power of ∣ x end exponent minus e to the power of negative x end exponent over denominator e to the power of x plus e to the power of negative x end exponent end fraction. text Then end text f stack stack text is end text with _ below with _ below$

$f colon R not stretchy rightwards arrow R$ is a function defined by $f left parenthesis x right parenthesis equals fraction numerator e to the power of ∣ x end exponent minus e to the power of negative x end exponent over denominator e to the power of x plus e to the power of negative x end exponent end fraction. text Then end text f stack stack text is end text with _ below with _ below$

The force acting on a body whose linear momentum changes by 20 kgms^-1in 10sec is

The force acting on a body whose linear momentum changes by 20 kgms^-1in 10sec is

parallel

Average force exerted by the bat is

Average force exerted by the bat 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

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

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.

parallel

Assertion : A body falling freely under gravity becomes weightless.
Reason: $straight R equals straight m left parenthesis straight g minus straight a right parenthesis equals straight m left parenthesis straight g minus straight g right parenthesis equals 0$

Assertion : A body falling freely under gravity becomes weightless.
Reason: $straight R equals straight m left parenthesis straight g minus straight a right parenthesis equals straight m left parenthesis straight g minus straight g right parenthesis equals 0$

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

Assertion : Frictional forces are conservative forces.
Reason: Polential energy can be associated with frictional forces

Assertion : Frictional forces are conservative forces.
Reason: Polential energy can be associated with frictional forces

parallel

When forces F₁,F₂,F₃ are acting on a particle of mass m such that F² and F³ are mulually perpendicelar. then the particle remains stationary. If the force F₁ is now removed than the acceleration of the particle is

When forces F₁,F₂,F₃ are acting on a particle of mass m such that F² and F³ are mulually perpendicelar. then the particle remains stationary. If the force F₁ is now removed than the acceleration of the particle is

The minimum force required to start pushing a body up a rough (coefficient of ) inclined plane is F₁. While the minimum force needed to prevent it from sliding down is F². If the inclined plane makes an angle $theta$ from the horizontal. such that than $theta equals 2 mu$ the ratio $F subscript 1 over F subscript 2$ is

The minimum force required to start pushing a body up a rough (coefficient of ) inclined plane is F₁. While the minimum force needed to prevent it from sliding down is F². If the inclined plane makes an angle $theta$ from the horizontal. such that than $theta equals 2 mu$ the ratio $F subscript 1 over F subscript 2$ is

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 ms²) 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 ms²) Neglect mass of the rope:

parallel

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