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A ball is travelling with uniform transl...

A ball is travelling with uniform translatory motion. This means that .

A

it is at rest.

B

the path can be a straight line or circular and the ball travels with uniform speed .

C

all parts of the ball have the same velocity (magnitude and direction) and the velocity is constant .

D

the centre of the ball moves with constant velocity and the ball spins about its centre uniformly .

Text Solution

Verified by Experts

The correct Answer is:
C
In a uniform translatory motion all parts of the ball have the same velocity in magnitude and direaction and this velocity is constant the situation is shown in adjacent diagram where a body A is uniform translatory motion.
.
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Knowledge Check

  • For a uniform motion.

    A
    the velocity-time graph is a straight line parallel to time axis
    B
    the position-time graph is a parabola
    C
    the acceleration-time graph is a straight line inclined with time axis
    D
    the position-time graph is a straight line

  • A ball attached to a string travels in uniform circular motion in a horizontal circle of 50 cm radius in 1 s. Sun light shining on the ball throws its shadow on a wall. The velocity of the shadow at the centre of the path is

    A
    `pi m//s`
    B
    `0.5pi m//s`
    C
    `0.5 m//s`
    D
    `1 m//s`

  • Assertion uniform circular motion is uniformly accelerated motion. Reason acceleration in uniform circular motion is always towards centre.

    A
    If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
    B
    If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
    C
    If Assertion is true but Reason is false.
    D
    If Assertion is false but Reason is true.

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    A tennis ball receives a top spin when struck by a racket and describes a curved trajectory. The top spin implies that the rotatory motion of the top surface of tha ball is in the direction of the translatory motion of the ball. Which one of the following statement is the best description of the trajectory ?

    (a) Explain the meaning of the following equation of motion : " "v=u+at where symbols have their usual meanings. (b) A body starting from rest travels with uniform acceleration. If it travels 100 m in 5 s, what is the value of acceleration.

    A particle shows uniform circular motion. Its motion is .

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