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  3. 8th Class
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  5. Force and Pressure

8th Class Science Force and Pressure Question Bank Force and Pressure Formative Objective Problems

  • question_answer
    Jack pushes a big cabinet with a force of 50 N. Under his force, the cabinet moves at a uniform speed. Jenny comes to help Jack. She begins to push the cabinet in the same direction with a force of 30 N.
    After Jennys arrival, speed of the moving cabinet will

    A)  increase          

    B)  decrease

    C)  remain same                    

    D)  become zero

    Correct Answer: A

    Solution :

      The total force exerted on the cabinet increases after the arrival of Jenny. Since both Jenny and Jack push the cabinet in the same direction, the speed at which it moves will increase. Hence, speed of the moving cabinet will increase. The correct answer is A.               


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