An 800 kg roller coaster car travels along the track. The magnitude of the car's velocity at point Y is 30 m/s.
What is the car's kinetic energy at Y?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

What property of an object determines its inertia?

Positive ions differ from neutral atoms in that