November 30, 2015

Homework Help: physics

Posted by Nick on Sunday, May 12, 2013 at 1:10am.

A helium balloon has a mass of 0.022 kg, which includes both the helium and the balloon itself. On this balloon, there is 0.290 N of buoyant force pushing the balloon upward. If I let go of the balloon, find the balloon's acceleration rate in the upward direction.

If we neglect air resistance, how long will it take for the balloon to reach a speed of 10 m/s?

Neglecting air resistance is a good approximation for heavy objects and slow-moving objects. Therefore, we should NOT neglect air resistance for a helium balloon once it starts moving. Let's say the balloon reaches its "terminal velocity" in the upward direction after about 2 seconds. What is the drag force acting on the balloon at this point?

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