I have some questions which I don't know how to do do. Please can someone help me do it please? I only have 20 mins to finish bunch of homework and out of all the questions, these are majors ones that I dont' know how to do.(adsbygoogle = window.adsbygoogle || []).push({});

1. The force of air resistance on a raindrop is 4.8 x 10^-5 N when it falls with a terminal velocity of 5.4 m/s.

The acceleration of gravity is 9.8 m/s^2.

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

2. A small piece of Styrofoam packing material is dropped from a height of 2.47 m above the ground. Until the terminal speed is reached, the acceleration is given bya = g - bv. After falling 0.64 m, it reaches terminal speed, and the Styrofoam takes an extra 2.2 s to reach the ground.

What is the value of the constantb? Answer in units of s^-1.

3. (Part of #2) What is the acceleration when the speed is 0.15 m/s? Answer in units of m/s^2.

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

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

# Homework Help: Some Physhics Help

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