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You are driving a motorcycle on a horizo...

You are driving a motorcycle on a horizontal road. It is moving with a uniform velocity. Is it possible to accelerate the motorcycle without putting higher petrol input rate into the engine?

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Knowledge Check

  • A car is moving with uniform velocity on a rough horizontal road. Therefore, according to Newton's first law of motion

    A
    No force is being applied by its engine
    B
    A force is surely being applied by its engine
    C
    An acceleration is being produced in the car
    D
    The kinetic energy of the car is increasing

  • A circular disc rolls on a horizontal floor without slipping and the center of the disc moves with a uniform velocity v. Which of the following values of the velocity at a point on the rim of the disc can have?

    A
    v
    B
    `-v`
    C
    3
    D
    Zero

  • Two cars A and B of equal masses (100 Kg) are moving on a straight horizontal road with same velocity 3m//s as shown. At t = 0 car A starts accelerating with constant acceleration of 2 m//s^(2) (intial separation between car is 25 m ). Choose correct options (neglect length of cars)

    A
    car `A` catches car `B` at `t = 6` sec.
    B
    magnitude of displacment of car `B w.r.t` car `A` is first `2` sec.
    C
    car `A` will catch car `B` at `t = 5` sec.
    D
    magnitude of displacement of car `B w.r.t.` car `A` is `4 m` in first `2` sec

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    Assume that a car is moving behind a loaded truck. Both moving with the same uniform velocity. A box from the top of the truck falls. Does car hit the box before the box hits the road, if driver neither brake nor accelerate ?

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    A lift is moving downwards. A body of mass 2 kg kept on the floor is pulled horizontally and is in motion. If the coefficient of friction between the body and floor is 1 // 2 , find the friction acting on the body if (a) lift is moving with a uniform velocity and (b) lift is moving with acceleration 5 m//s^(2) in the downward direction.

    A uniform disc of mass 1 kg and radius 20 cm is rolling purely on a flat horizontal surface. Its centre C is moving with acceleration a = 20 ms^(-2) and velocity v =4 m//s at a certain instant. At this instant. points A and B are located on the disc as shown in the diagram, with AC = BC = 10 cm . What is the acceleration magnitude of point A ?

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