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avatarEfficientEagle2708
Postsecondary • 1mo.

I need help with these physics questions this is from a past exam to help me prepare for my exam

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  • Explanation from Alloprof

    Explanation from Alloprof

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      avatarPoutineOrange5768teacher check
      Team Alloprof • 1mo.

      Hi EfficientEagle2708! 😎


      For the first one (12), as the ball slows down, it gains height, in other words, the kinetic energy is transformed in potential energy. Therefore, no energy is created or lost, so there is no work.


      For the gravity, it works to the bottom, against the ball. Therefore, the work will be given by m*g*h.


      To find the work, you always need to find the energy that was lost or created.


      For the second one (15), you seem to understand it! To find the answer, you need to use 1/2m vsquared. Because the speed is squared, if you double it (x2), it will become 4 times bigger (2x2).

      You had the right answer, keep up the good work!!🔥🔥


      Feel free to ask other questions!😊

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