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3rd Class Science Lights, Sound and Force Question Bank Light Sound and Force

  • question_answer
     
    The girl a is putting more efforts to pull the sack bag as compared to the girl b. Girl a has to work more against a force which also _______.

    A) Changes the direction of a moving object

    B) Causes all objects to fall to the ground

    C) Prevents us from slipping when we walk

    D) Makes a stationary object to move

    Correct Answer: C

    Solution :

    Wheel cart reduces friction between sack bag and floor making it easier to pull the bag. Friction is present between a surface and object put on it and resists its motion. Friction is the force which prevents us from slipping when we walk.


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