I have a test tomorrow and i lost all my papers on how to do this stuff. And i have this paper that has examples of all the problems i need to know how to do.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

1. A humming bird has a mass of 1.70 g. if the hummingbird ascends straight up with a net acceleration of 1.20 m/s^2, how much work does it do over a distance of 8 m.

2. The longest shish kabob ever made was 881 m long. Suppose the meat and vegetables need to be delivered in a cart from one end of this shish kebab to the other end. A cook pushes the cart by applying a force of 40.0 N at an angle that is 45ยบ above the horizontal. If the force of friction acting on the cart is 28 N what is the net work done on the cart and its contents during the delivery.

2. Relevant equations

W=DF

3. The attempt at a solution

1. (.0017kg) / (1.2 m/s^2) = .0014 N

.0014 x 8m = .0113 J

What am i doing wrong?

2. I have know idea how to do this one.

**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!

# Test Tomorow on work, and more

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