Suppose I stand on an ideal skateboard (so there is no friction with the floor) and start from rest when I push on a wall with a known force, I measure my speed after one second. Which of the following is true?

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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Suppose I stand on an ideal skateboard (so there is no friction with the floor) and start from rest when I push on a wall with a known force, I measure my speed after one second. Which of the following is true?

(Only one is completely true.)

     
   

My mass is calculable from the speed because I know the acceleration due to gravity.

   

The speed and time give acceleration, but from this, I don't know the force on me so I cannot measure my mass. 

   

Not  only can this information be used to calculate my mass; I don't even need to measure the speed to get it. 

   

Since the wall pushes back on me with the same magnitude force, knowing the speed and time gives me acceleration, so I can calculate my mass.

   

Since the wall pushes back on me with the same magnitude force, if I had measured the distance travelled in that second  instead of the speed, then I could calculate my mass, but from this information I cannot.

   

This could almost be used to calculate my mass, but since energy is not conserved it will not work.

   

My mass is irrelevant to the problem, so there is no way I could calculate it from this information.

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