Lab: Motion Step 5: Measure the speed of the Toy Car on the Higher Track
Calculate the change in time for each quarter of the
track. Record the change in time in Table E of your
Student Guide
The change in time for the first quarter is
seconds
The change in time for the second quarter is
seconds
The change in time for the third quarter is
seconds
The change in time for the fourth quarter is
seconds.

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)