Answers to Internet Questions

Unit I Friction & the Inclined Plane

1. Use F_gcos20^o to get the answer of 184 N
2. Weight of wagon is 684 N
3. The force required is 110 N
4. The coefficient of friction is 0.39
5. The force of gravity trying to pull the cart downhill must be balanced by the friction and the tension in the rope of you holding it. The force of you pulling on the rope is 115 N
   b) approximately 9.5^o
6. 1. Force needed to push load uphill is 272 N
   2. The normal force is 348 N
   3. The force of friction is 90 N
   4. The actual force (friction included) is 362 N

Any addition assistance is available in class. Just bring up your work and we will go over it.