Home
Class 11
PHYSICS
A car is moving with a uniform velocity ...

A car is moving with a uniform velocity along a horizontal road. Does the engne of car do any work in this instance ?

Text Solution

Verified by Experts

Force of friction acts opposite to the direction of motion of the car. Force applied by the engine of the car against friction maintains its uniform velocity . This force is doing work as displacement occurs against frication. If f= force of friction and v=velocity of the car, work done in 1s by the engine = force of friction `xx` constant velocity =fv.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • WORK AND ENERGY

    CHHAYA PUBLICATION|Exercise EXERCISE (Multiple Choice Questions)|33 Videos

  • WORK AND ENERGY

    CHHAYA PUBLICATION|Exercise EXERCISE (Very short Answer Type Questions)|30 Videos

  • WORK AND ENERGY

    CHHAYA PUBLICATION|Exercise SECTION RELATED QUESTIONS|24 Videos

  • WBCHSE QUESTION PAPER -2019

    CHHAYA PUBLICATION|Exercise SECTION - II ( GROUP -D)|10 Videos

Similar Questions

Explore conceptually related problems

A truck, carrying sand, moves with uniform velocity u on a smooth horizontal road. If Delta m mass of sand falls in time Delta t from the truck, then to maintain the speed u, the truck needs a force

To hit a car a gun is positioned horizontally behind the car along a straight road. The car is moving on the road with a uniform velocity of 72 km*h^(-1) . If the gun is fired at an angle of 45^@ with the horizontal , at a distance of 500 m from the car, find the distance of the car from the gun just when the bullet hits the car. Given, g=10 m/s^2 .

Knowledge Check

  • A car moves with a uniform velocity of 36 "km.h^(-1) on a straight road Then it attains a uniform acceleration and doubles its velocity in 10s. The radius of a wheel of the car it 25 cm. The number of complete rotations of the wheel in those 10s would be about

    A
    84
    B
    95
    C
    126
    D
    135

  • In order to stop a car in shortest distance on a horizontal road one should

    A
    apply the brakes very hard so that the wheels stop rotating
    B
    apply the brakes hard enough to just prevent slipping
    C
    pump the brakes (Press and release)
    D
    shut the engine off and not apply brakes

    • Similar Questions

    Explore conceptually related problems

    A person is carrying a bucket of water, and is in a lift moving up with uniform velocity . Is the person doing any work on the bucket of water ? Will the energy of the bucket and water remain constant ?

    A motor car is moving with a constant speed . Is the car engine doing any work?

    A car of mass 500 kg moves with a constant velocity 72km/hr (i) along a horizontal path,Coefficient of sliding friction between the road and the wheel is 0.1 . Find the engine power

    A car is moving with the initial velocity 15 m/s. Car stoped after 5s by application of breaks. Find the retardation (Decelaration).

    Particle A moves along X-axis with a uniform velocity of magnitude of m/s. Particle B moves with uniform velocity 20 m/s along a direction making an angle of 60^(@) with the positive direction of X - axis as shown in the figure. The relativity velocity of B with respect to that of A is

    A car of mass m is moving with a velocity v over a bridge. What will be the values of the force F at the highest point of a convex bridge and at the lowest point of a concave bridge?

    Home
    Profile