Physics

General

Easy

### Question

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

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

- a
- b
- c
- d

#### The correct answer is: a

## Book A Free Demo

+91

Grade*

Select Grade

### Related Questions to study

physics

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

Reason:

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

Reason:

physicsGeneral

physics

#### 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

physics

#### 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

physics

#### 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

physicsGeneral

physics

#### 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

#### 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

physicsGeneral

physics

#### 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:

physicsGeneral

physics

#### 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

physics

#### 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

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.

#### 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

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

physicsGeneral

physics

#### 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

physicsGeneral

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

physics

#### A block of mass m =2 kg is resting on a rough inclined plane of inclination 30^{0} as shown in fignre The coefficient of friction between the block and the plane is=0.5 . What minimam force shald be applied perpendicular to the plane of block does not slip on the plane ?(g=10ms^{-2})

#### A block of mass m =2 kg is resting on a rough inclined plane of inclination 30^{0} as shown in fignre The coefficient of friction between the block and the plane is=0.5 . What minimam force shald be applied perpendicular to the plane of block does not slip on the plane ?(g=10ms^{-2})

physicsGeneral

physics

#### A car of mass 1000 kg travelling at 32 m/s cleches into a rear of a truck of mass 8000 kg moving in the same direction with a velocity of 4m/s. After the collision the car bounces with a velocity of 8ms^{-1} The velocity of truck after the impact is..m/s

#### A car of mass 1000 kg travelling at 32 m/s cleches into a rear of a truck of mass 8000 kg moving in the same direction with a velocity of 4m/s. After the collision the car bounces with a velocity of 8ms^{-1} The velocity of truck after the impact is..m/s

physicsGeneral