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Motion Test - 3

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Motion Test - 3
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  • Question 1
    1 / -0

    If the speed-time graph is a straight line parallel to the time axis, then the body is in

    Solution

    Since the graph line is parallel to the time axis, it indicates that the speed remains constant with time.

    Thus, the body is in uniform motion.

     

  • Question 2
    1 / -0

    The ______ of a distance versus time graph is speed.

    Solution

    The slope of a distance versus time graph is speed.

     

  • Question 3
    1 / -0

    For a body starting from rest and moving with uniform acceleration, the ratio of the distances covered for 1 s, 2 s, 3 s, ..... is

    Solution

    We know that, s = ut + (1/2) at2

    Given that the body starts from rest → u = 0 and also the motion is uniformly accelerated, i.e. a remains constant.

    →s = (1/2) at

    Thus, s is directly proportional to t2

     

  • Question 4
    1 / -0

    A body is said to be in uniform motion when it travels

    Solution

    If a body covers equal distance in equal interval of time, then it is said to be in uniform motion.

     

  • Question 5
    1 / -0

    A quantity has a value of -16 m/s2. What does it represent?

    Solution

    Metre per second square is a unit of acceleration and negative acceleration is known as retardation.

     

  • Question 6
    1 / -0

    If the upward direction is taken as positive then what will be the sign of velocity and acceleration when a body falls freely from a height.

    Solution

    Both velocity and acceleration are in the downward direction. Thus, they will be considered negative as they are vectors and the upward direction is positive.

     

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