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Motion in A Straight Line Test - 7

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Motion in A Straight Line Test - 7
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  • Question 1
    1 / -0

    A truck accelerates at 1 m / sec2 from rest. What is its velocity in m/s at a time of 2 sec?

    Solution

    Initial velocity u = 0 m/s

    final velocity = v 

    Time t = 2 s

    Acceleration a = 1 m/s​​​​​​2

    We know,

    v = u + at

    =>v = 0 + 1 × 2

    => v = 2 m/s

  • Question 2
    1 / -0

    A truck has a velocity of 2 m /s at time t=0. It accelerates at 2 m / s2 on seeing police .What is its velocity in m/s at a time of 2 sec

    Solution

    Initial velocity u = 2 m/s

    final velocity = v m/s

    Time duration = final time - initial time = 2-0 = 2 s

    acceleration a = 2 m/s​​​​​​2

    We know,

    v = u + at

    => v = 2 + 2 × 2

    => v = 6 m/s

  • Question 3
    1 / -0

    A truck has a velocity of 3 m /s at time t=0. It accelerates at 3 m / s2 on seeing police .What is its velocity in m/s at a time of 2 sec

    Solution

    Initial velocity u = 3 m/s

    Acceleration a = 3 m/s​​​​​​2

    Initial time t1  = 0s

    Final time t2 = 2  s

    Time taken t = 2 - 0 = 2 s 

    Final velocity v = ?

    We know,

    v = u + at

    =>v = 3 +  2 × 3 

    =>v  = 3 + 6 = 9 m/s2

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