Connect Education Worked Solutions

[appianway]

Here's a link to the Connect Education worked solutions! http://connecteducation.com.au/physics-answers.html Each question should have an explanation of how the solution was reached, which will be useful if you're not sure exactly what you did in the exam, or how to get the answer.

[oneoneoneone]

q7c Your answer says that the speed is greater at the bottom, but the question says that the speed is constant. Is that wrong then?

[appianway]

Whoops, didn't see that it was being spun at constant speed (went through the paper pretty quickly to get it done asap). In this case, the answer would be because the centripetal force is the sum of the gravitational force and the tension force, and at the top, mg is directed in the same direction as the centripetal force, whereas at the bottom, the weight force is directed in the opposite direction, so the tension needs to be greater to "cancel out" the weight force. Thanks for picking that up!