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Force Test - 1

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Force Test - 1
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Two forces of 3N and 4N act on a body to the left, while another force of 7N acts on it to the right. What is the resultant of the forces?

  • Question 2
    1 / -0

    If the sum of all the forces acting on a moving object is zero, the object will

  • Question 3
    1 / -0

    A bucket containing water is rotated in a vertical circle at a high speed. What will happen to the water when the bucket is upside down at the highest point?

  • Question 4
    1 / -0

    Unless an external force is applied, an object cannot change its state of rest or motion due to

  • Question 5
    1 / -0

    A force of 20 N acts upon a body whose weight is 9.8 N on the earth. What is the acceleration produced in the body?

    Solution

    Given:
    Force f = 20N

    Mass m = 9.8 kg
    Acceleration = a m/s2

    f = ma
    a = f ÷ m
    = 20 ÷ 9.8 = 2.04 m/s2

     

  • Question 6
    1 / -0

    A force of 250 N is applied on an object to produce an acceleration of 2 m/s2. What is the mass of the object?

    Solution

    Given:
    Force, f = 250 N

    Acceleration a = 2 m/s2
    Mass = m kg

    f = ma
    m = f ÷ a = 250 ÷ 2 = 125 kg

     

  • Question 7
    1 / -0

    Two forces F1 and F2 act on two bodies A and B of masses 'm' and '2m', respectively. What is the ratio of accelerations produced?

  • Question 8
    1 / -0

    An object of mass 50 g is initially moving with a velocity of 30 ms-1. On applying a constant force on the object for 3.0 s, it acquires a velocity of 60 ms-1. What is the magnitude of the force applied?

    Solution

    Given:
    Mass, m = 50 g = 0.05 kg

    Initial velocity, u = 30 ms-1
    Final velocity, v = 60 ms-1

    Time, t = 3 s
    v = u + at

    60 = 30 + 3a
    3a = 30

    a = 10
    Force, f = ma
    = 0.05 x 10 = 0.5 N

     

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