Anouncements #

Quiz 7 #

Part 1 #

The shape made by swinging the string makes a cone.

To find the angle look at the second equation.

The radius of the circle is $lsin \theta$

Solve for $v$.

Part 2 #

Vertical circle

We’re interested in the ball at three different points.

Part A

Solve for $v$

Part B

Solve for $v$

Part C

HW #

2 #

Positive torque clockwise, negative torque CCW.

Solve for $\ell_2$

If getting the wrong answer switch the place of the pivot and the center of mass.

Switch sign (at red arrow above)

Part B

Use the other condition of equilibrium

3 #

What is the force applied at that orientation to achieve the given torque.

The perpendicular force results in the wrench spinning.