With the class watching from a safe (and dry!) distance below, suppose the student drops the balloon and the balloon hits the sidewalk with a force of 20 N. How much work was done on the sidewalk by the balloon?
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To determine the work done on the sidewalk by the balloon, we need to use the formula for work:
Work = Force x Distance x cos(theta)
In this case, the force exerted by the balloon on the sidewalk is given as 20 N. However, we don't have the distance or the angle (theta).
To find the work done, we need to know the distance over which the balloon applies the force. Since the problem doesn't provide this information, we can't calculate the work done.
Therefore, without the distance, it is not possible to determine how much work was done on the sidewalk by the balloon.