Physics
General
Easy
Question
Average force exerted by the bat is
- 480 N
- 120 N
- 1200 N
- 840 N
The correct answer is: 480 N
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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
physicsGeneral
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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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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 : 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.
physicsGeneral
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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.
Reason: Polential energy can be associated with frictional forces
physicsGeneral
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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
physicsGeneral
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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 
from the horizontal. such that than 
the ratio 
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 from the horizontal. such that than the ratio 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 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:
physicsGeneral
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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?
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?
physicsGeneral
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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
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
physicsGeneral
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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.
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
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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
physicsGeneral
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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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Maths-
Let 
Let
Maths-General
physics
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……
physicsGeneral
