(adsbygoogle = window.adsbygoogle || []).push({}); #1.

The force of air resistance on a raindrop is 5 x 10^-5 N when it falls with a terminal velocity of 4.2 m/s.

The acceleration of gravity is 9.8 m/s2.

What is the mass of the raindrop? Answer in units of kg.

How would I do this question? My understanding is to divide the Force of air resistance on a raindriop by the acceleration of gravity to get the mass of the raindrop.

and the other question is,

#2.

007 (part 1 of 2) 5 points

A block weighing 6.9 N requires a force of 2.4 N to push it along at constant velocity.

What is the coefficient of friction for the surface?

I'm new to friction so I don't know what to do here..

Any ideas would be appreciated. :)

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

Dismiss Notice

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!

# Force Problems.

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