Mcat Physics Question: A 10 kg. mass is in free fall with no air resistance. In order to slow the mass at a rate equal to the magnitude of g, an upward force must be applied with magnitude:(adsbygoogle = window.adsbygoogle || []).push({});

0 N, 10 N, 100 N, or 200 N.

I solved if F=mg then F=10*10 or 100 N downward force. Therefore an upward force of 100 N resistance would be required. Why is the answer 200 N? Answer book says you want a net force of mg=100 N upwards but I'm not sure why 200 N upward is equal to a magnitude of g, which is only 100 N downward. What am I missing here?

Leigh

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Need help with MCAT Physics Question

**Physics Forums | Science Articles, Homework Help, Discussion**