Which of the following situations is impossible
a) a body having velocity east and acceleration west
b) a body having velocity east and acceleration east
c) a body having zero velocity but non-zero acceleration
d) a body having constant velocity but non-zero acceleration

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

What types of radiation make up the electromagnetic spectrum?